MedWorm.com provides a medical RSS filtering service. Over 6000 RSS medical sources are combined and output via different filters. This feed contains the latest items from the 'Applied Organometallic Chemistry' source. Thu, 09 Feb 2012 13:01:27 +0100 http://www.medworm.com/index.php?rid=5673542&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.2826 AgOTf proved to be an effective catalyst for the transesterification of β‐keto esters with primary, secondary and tertiary alcohols. The products were obtained in high yield within a reasonable reaction time period. The kinetics of the transesterification reaction were also studied and the reaction was found to follow second‐order kinetics. Copyright © 2012 John Wiley & Sons, Ltd.AgOTf proved to be an effective Lewis acid catalyst for the transesterification of β‐ketoesters with a variety of aromatic, aliphatic and allylic alcohols in boiling toluene. (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5673542 Wed, 08 Feb 2012 05:00:00 +0100 5673542 http://www.medworm.com/index.php?rid=5673541&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1871 Hybrid compounds of molybdovanadophoric heteropolyacids and a Schiff base transition metal complex, M‐saldmp or M‐fpdmp (M = Fe(II), Co(II), Cu(II)), were successfully prepared and found to be effective catalysts for direct hydroxylation of benzene with H2O2. The synergistic effect between Schiff base metal complex and heteropolyacid plays an important role in the promotion of catalytic activity. Copyright © 2012 John Wiley & Sons, Ltd.Two types of polyoxometalate‐based hybrid compounds (A) and (B) were prepared by a simple method and found as effective catalysts to direct hydroxylation of benzene with H2O2. Among the hybrid catalysts examined, Cufpdmp‐PMo10V2 shows the best activity with the highest benzene conversion of 26.3 % and phenol selectivity of 93.4 %, respective... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5673541 Wed, 08 Feb 2012 05:00:00 +0100 5673541 http://www.medworm.com/index.php?rid=5673540&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1873 Monodisperse crosslinked poly(hydroxyethyl methacrylate) particles (pHEMA) were synthesized for immobilization of the chiral Mn(III)salen homogeneous catalyst by axial coordination. The pHEMA‐Mn(III)salen catalyst was subsequently characterized by FT‐IR, UV and scanning electron microscopy. The results showed that, the heterogeneous Mn(III)salen catalysts also exhibited high activity and enantioselectivity compared to the homogeneous catalyst for the disubstituted cyclic indene and 6‐cyano‐2,2‐dimethylchromene. Moreover, the catalysts were easily separated from the reaction systems and could be renewed several times without significant loss of catalytic activity. Meanwhile, the enantiomeric excess (ee) value remained at 80% in the eighth cycle. The pHEMA support, immobilized by M... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5673540 Wed, 01 Feb 2012 05:00:00 +0100 5673540 http://www.medworm.com/index.php?rid=5643526&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.2824 (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5643526 Tue, 31 Jan 2012 11:10:07 +0100 5643526 http://www.medworm.com/index.php?rid=5643527&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.2820 Several novel chiral thiazoline primary and tertiary alcohols were easily synthesized from commercially available l‐cysteine in three steps and with high yield. These ligands were subsequently applied to the asymmetric addition of diethylzinc (Et2Zn) to various aldehydes. Products with S configuration were obtained when thiazoline‐containing tertiary alcohol ligands were used as catalysts. The primary alcohol induced corresponding products with R configuration in 68% enantiomeric excess, which was a higher value relative to other N―O ligands possessing a primary alcohol unit in the literature. Furthermore, a plausible transition state model was proposed to explain the observed enantioselectivities. Copyright © 2012 John Wiley & Sons, Ltd.Several novel chiral thiazoline primary w... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5643527 Tue, 31 Jan 2012 05:00:00 +0100 5643527 http://www.medworm.com/index.php?rid=5634986&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.2819 The catalytic activity of ruthenium(II) bis(diimine) complexes cis‐[Ru(6,6′‐Cl2bpy)2(OH2)2](Z)2 (1, Z = CF3SO3; 2, Z = (3,5‐(CF3)2C6H3)4B, i.e. BArF) and cis‐[Ru(4,4′‐Cl2bpy)2(OH2)2](Z)2 (3, Z = CF3SO3; 4, Z = BArF) for the hydrogenation and/or the hydrogenolysis of furfural (FFR) and furfuryl alcohol (FFA) was investigated. The molecular structures of cis‐[Ru(4,4′‐Cl2bpy)2(CH3CN)2](CF3SO3)2 (3′) and dimeric cis‐[(Ru(4,4′‐Cl2bpy)2Cl)2](BArF)2 (5) were characterized by X‐ray crystallography. The structures are consistent with the anticipated reduction in steric hindrance about the ruthenium centers in comparison with corresponding complexes containing 6,6′‐Cl2bpy ligands. While compounds 1–4 are all active and highly selective catalysts fo... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5634986 Fri, 27 Jan 2012 18:04:32 +0100 5634986 http://www.medworm.com/index.php?rid=5634985&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1872 Bromomaleimides react with cysteine residues to form thiomaleimides that can be further cleaved with TCEP (tris(2‐carboxyethyl)phosphine) to regenerate the cysteine derivatives. Herein we report the preparation of new organometallic Fe complexes containing monobromo and dibromo maleimide ligands. Both of these complexes were characterised by X‐ray diffraction. Organometallic bromomaleimide derivatives were reacted with the thiol‐containing biomolecules: cysteine ethyl ester hydrochloride, glutathione and papain. These cysteine‐containing molecules underwent a substitution reaction with metallocarbonyl bromo‐ or dibromo maleimide complexes, followed by an addition reaction to the thio‐maleimide double bond if thiol was added in excess. The metallocarbonyl mono‐bromomaleimide c... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5634985 Fri, 27 Jan 2012 18:04:31 +0100 5634985 http://www.medworm.com/index.php?rid=5634984&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1868 Six organophosphine/phosphite‐stabilized silver(I) N‐hydroxysuccinimide complexes of type [C4H4NO3Ag⋅Ln] (L = PPh3; n = 1, 2a; n = 2, 2b; L = P(OEt)3; n = 1, 2c; n = 2, 2 d; L = P(OMe)3; n = 1, 2e; n = 2, 2f) were prepared. These complexes were obtained in high yields and characterized by elemental analysis, 1H NMR, 13 C{1H} NMR and IR spectroscopy, respectively. The molecular structure of 2b has been determined by X‐ray single‐crystal analysis in which the silver atom is in a distorted tetrahedral geometry. An interstitial methanol solvent molecule is hydrogen bonded to the oxygen atom of N‐hydroxysuccinimide molecule. Complex 2f was used to deposit silver films by metal‐organic chemical vapor deposition (MOCVD) for the first time. The... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5634984 Fri, 27 Jan 2012 18:04:28 +0100 5634984 http://www.medworm.com/index.php?rid=5592469&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1866 A number of ruthenium complexes were prepared and their catalytic activities in three‐component one‐pot condensation of aldehydes, malononitrile and 4‐hydroxycoumarin or dimedone was considered to afford dihydropyrano[3,2‐c]chromenes and tetrahydrobenzo[b]pyran derivatives under optimum reaction conditions. We found that a catalytic amount of RuBr2(PPh3)4 efficiently promotes the reaction in a short time (3–15 min) and with high yield (75–88%). Copyright © 2012 John Wiley & Sons, Ltd. (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5592469 Tue, 10 Jan 2012 05:00:00 +0100 5592469 http://www.medworm.com/index.php?rid=5592468&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1863 The activity of [Pd{C6H4(CH2N(CH2Ph)2)}(μ‐Br)]2 complex was investigated in cross‐coupling reactions of triethoxy(phenyl)silane with various aryl halides under microwave irradiation. This complex is an efficient and stable catalyst for the synthesis of substituted biphenyls that is non‐sensitive to air and moisture. The combination of dimeric complex as homogenous catalyst, microwave irradiation, DMF as microwave‐active polar solvent and TBAF as microwave‐active additive led to excellent yields in short reaction times. Copyright © 2012 John Wiley & Sons, Ltd.The catalytic activity of [Pd{C6H4(CH2N(CH2Ph)2)}(m‐Br)]2 complex as an efficient catalyst investigated in the Hiyama cross‐coupling reactions of triethoxy(phenyl)silane with various aryl halides under microwave irr... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5592468 Tue, 10 Jan 2012 05:00:00 +0100 5592468 http://www.medworm.com/index.php?rid=5592467&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1869 Bacterial adhesion, mediated through interaction of bacterial lectins with carbohydrate structures presented on the surface of the host cells, is a prerequisite for infection. Anti‐adhesion therapy, based on the inhibition of lectins by suitable carbohydrates, has been considered as a weapon for the combat of microbial diseases. Structural alteration of aglycon portions of mannose derivatives strongly influences their inhibitory potency toward type 1 fimbriated Escherichia coli. Thus several conjugates of mannose‐containing ferrocene aglycon moieties were synthesized and tested. The novel ferrocene conjugates 10, 12 and 14 were obtained by esterification of O‐mannosylated propionic acid 1 with ferrocene alcohols R‐Fn‐(CH2)n‐OH (Fn = 1,1'‐ferrocenylene; 2, n = 1, R =... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5592467 Tue, 10 Jan 2012 05:00:00 +0100 5592467 http://www.medworm.com/index.php?rid=5592466&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.2821 Metal(loid)s are subject to many transformation processes in the environment, such as oxidation, reduction, methylation and hydride generation, predominantly accomplished by prokaryotes. Since these widespread processes affect the bioavailability and toxicity of metal(loid)s to a large extent, the investigation of their formation is of high relevance. Methanogenic Archaea are capable of methylating and hydrogenating Group 15 and 16 metal(loid)s arsenic, selenium, antimony, tellurium, and bismuth due to side reactions between central methanogenic cofactors, methylcobalamin (CH3Cob(III)) and cob(I)alamin (Cob(I)). Here, we present systematic mechanistic studies on methylation and hydride generation of Group 15 and 16 metal(loid)s by CH3Cob(III) and Cob(I). Pentavalent arsenical species showe... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5592466 Tue, 10 Jan 2012 05:00:00 +0100 5592466 http://www.medworm.com/index.php?rid=5568300&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1862 An environmentally friendly and efficient process whereby FeCl3•6H2O/2,2,6,6‐tetramethylpiperidine N‐oxyl (TEMPO)‐catalyzed oxidation of alcohols to the corresponding aldehydes and ketones is accomplished in the presence of silica gel using molecular oxygen or air as the terminal oxidant. The electron‐deficient benzyl alcohol was smoothly oxidized to the corresponding aldehydes with up to 99% isolated yield. It was found that silica gel not only could enhance the catalytic reaction rate but also increase the selectivity for the product. The high performance of FeCl3•6H2O/TEMPO catalyst system in the presence of silica gel might be attributed to the surface silanol groups. UV–visible spectra analysis showed that the Fe (III)–TEMPO complex could serve as the active intermedia... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5568300 Thu, 05 Jan 2012 05:00:00 +0100 5568300 http://www.medworm.com/index.php?rid=5568301&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1853 The ability of transition metal catalysts to add or remove hydrogen from organic substrates by transfer hydrogenation is a valuable synthetic tool. Towards a series of novel metal complexes with a P―NH ligand, [Ph2PNHCH2―C4H3O] derived from furfurylamine were synthesized. Reaction of [Ph2PNHCH2―C4H3O] 1 with [Ru(η6‐p‐cymene)(μ‐Cl)Cl]2, [Ru(η6‐benzene)(μ‐Cl)Cl]2, [Rh(μ‐Cl)(cod)]2 and [Ir(η5‐C5Me5)(μ‐Cl)Cl]2 gave a range of new monodentate complexes [Ru(Ph2PNHCH2―C4H3O)(η6‐p‐cymene)Cl2] 2, [Ru(Ph2PNHCH2―C4H3O)(η6‐benzene)Cl2] 3, [Rh(Ph2PNHCH2‐C4H3O)(cod)Cl] 4, and [Ir(Ph2PNHCH2‐C4H30)(η5‐C5Me5)Cl2] 5, respectively. All new complexes were fully characterized by analytical and spectroscopic methods. 31P‐{1H} NMR, distortionless enhancement by p... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5568301 Tue, 03 Jan 2012 05:00:00 +0100 5568301 http://www.medworm.com/index.php?rid=5532737&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1865 An encapsulated Mn(III)–salen complex in NaY was synthesized and characterized, and the catalytic behaviour of the complex was evaluated by the oxidation of styrene. The encapsulation was achieved by two different methodologies designated as the flexible ligand method (A) and the method of in situ complex synthesis (B). The characterizations of the free complex as well as the catalysts with and without the complex were performed by powder X‐ray diffraction, scanning electron microscopy, chemical analysis and FT‐IR spectroscopy. Both prepared catalysts are active in the oxidation of styrene in the presence of tert‐butyl hydroperoxide (tBuOOH) and lead to styrene epoxide and benzaldehyde. The localization of the complex in zeolite plays an important role in the catalytic activity of ... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5532737 Tue, 20 Dec 2011 05:00:00 +0100 5532737 http://www.medworm.com/index.php?rid=5532736&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1860 The catalytic activity of [Pd{C6H4(CH2N(CH2Ph)2)}(μ‐Br)]2 complex as an efficient, stable and catalyst that is non‐sensitive to air and moisture was investigated in the Stille cross‐coupling reaction of various aryl halides with phenyltributyltins under microwave irradiation. The substituted biaryls were produced in excellent yield in short reaction times using a catalytic amount of this complex in DMF at 100 C. The combination of dimeric complex as homogeneous catalyst and microwave irradiation and also DMF as microwave‐active polar solvent gave higher yields in shorter reaction times. Copyright © 2011 John Wiley & Sons, Ltd.The catalytic activity of [Pd{C6H4(CH2N(CH2Ph)2)}(m‐Br)]2 complex as an efficient catalyst investigated in the Stille cross‐coupling reaction of v... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5532736 Tue, 20 Dec 2011 05:00:00 +0100 5532736 http://www.medworm.com/index.php?rid=5500777&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1852 A cadmium complex bis(benzyltriethylammonium) bis(1,3‐dithiole‐2‐thione‐4,5‐dithiolato)‐cadmium(II) ((TEBA)2[Cd(DMIT)2]) has been synthesized and its crystal structure has been determined by means of X‐ray single‐crystal diffraction. The central cadmium(II) ion coordinates with two DMIT, which constructed a distorted tetrahedron environment. Its third‐order nonlinear optical properties have been studied using Z‐scan technique with 20 ps pulses at wavelength 1064 nm. Its third‐order nonlinear susceptibility χ(3) value was determined to be 1.24 × 10−19 m2 V−2, the figure of merit, χ(3)/α0, was estimated to be 2.64 × 10−20 m3 V−2. Copyright © 2011 John Wiley & Sons, Ltd.A cadmium complex complex constructed by the ligand: 1,3‐dithi... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5500777 Mon, 12 Dec 2011 05:00:00 +0100 5500777 http://www.medworm.com/index.php?rid=5592465&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1867 A nucleophilic substitution reaction of an α‐ferrocenyl alcohol with various amines, indoles and thiols was successfully developed by using a catalytic amount of Bi(NO3)3.5H2O at room temperature without the aid of phase transfer catalyst. The reactions proceeded in aqueous media, leading to the formation of new C=C, C=N and C=S bonds bearing ferrocenyl substituent with high efficiency. Copyright © 2012 John Wiley & Sons, Ltd.The formation of C‐N, C‐C and C‐S bond between ferrocenyl alcohol and nucleophiles was achieved. The reaction was performed in aqueous medium and catalyzed by 5 mol% Bi(NO3)3·5H2O at room temperature, without further addition of surfactants. By nucleophilic substitution in this system, a series of ferrocenyl derivatives were obtained in moderate to good... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5592465 Thu, 01 Dec 2011 05:00:00 +0100 5592465 http://www.medworm.com/index.php?rid=5568298&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1861 Acid‐catalyzed controlled hydrolytic polycondensation of tetraethoxysilane (TEOS) and tetramethoxysilane (TMOS) provided polyalkoxysiloxanes PEOS and PMOS, with high molecular weight of 1100–12 000 or 2700–31 000, respectively. They were stable to self‐condensation, soluble in organic solvents, and especially characterized by high silica content of up to 62% (PEOS) and 72% (PMOS). Flexible and transparent free‐standing films with tensile strength of 1.6–5.2 MPa (PEOS) or 3.6–11.8 MPa (PMOS) were prepared by heating polyalkoxysilanes at 80°C for one to several days. They are also regarded to be a potential precursor for coatings and binders. Copyright © 2011 John Wiley & Sons, Ltd.Acid‐catalyzed controlled hydrolytic polycondensation of tetraethoxysilane and tetram... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5568298 Thu, 01 Dec 2011 05:00:00 +0100 5568298 http://www.medworm.com/index.php?rid=5532738&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1843 This article provides a critical review of the different applications of ferrocene‐based peptides/amides in biological as well as in non‐biological systems. Ferrocene‐based peptides/amides find many applications in different fields such as materials science, medicine, organic synthesis, bio‐organometallic and biological chemistry, asymmetric catalysis, nonlinear optics, in polymer science as redox active polymers and dendrimers, in molecular recognition as biosensors and in electrochemistry). Extensive research is being done on ferrocene‐based peptides/amides but we will highlight the various applications of ferrocene‐based peptides/amides for the period 2006–2010. The main factors that govern the potential biological and non‐biological applications are an electroactive cor... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5532738 Thu, 01 Dec 2011 05:00:00 +0100 5532738 http://www.medworm.com/index.php?rid=5532735&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1857 An efficient and reusable heterogeneous catalytic assembly of PdCl2 held in ionic liquid brushes has been synthesized and an environmentally‐friendly procedure was developed for coupling aryl iodides with acrylic acid. These reactions were conducted in water under aerobic conditions with water‐insoluble or even solid aryl iodides and they proceeded smoothly and cleanly without any organic co‐solvent or other additives. A 0.5 mol% (based on Pd atom) dose of the catalyst was found to be sufficient for Mizoroki–Heck reaction. The catalyst is easily recovered post reaction, via simple filtration, and reused at least eight times without a noticeable loss of activity. The protocol has the advantages of excellent yield, environmental friendliness, and catalyst recyclability. Copyright �... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5532735 Thu, 01 Dec 2011 05:00:00 +0100 5532735 http://www.medworm.com/index.php?rid=5464725&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1849 (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5464725 Tue, 29 Nov 2011 05:00:00 +0100 5464725 http://www.medworm.com/index.php?rid=5464724&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1855 A new 1,2‐dihydroquinazolinone, 2‐(2‐hydroxy‐phenyl)‐3‐[1‐(2‐oxo‐2H‐chromen‐3‐yl)‐ethylideneamino]‐2,3‐dihydro‐1H‐quinazolin‐4‐one (L) and its Mn(II), Co(II), Ni(II), Cu(II) and Zn(II) complexes have been prepared. These were characterized by elemental, spectral [UV–visible, IR, NMR (1H, 13C and 2D heteronuclear correlation) and mass], conductance, magnetic susceptibility and thermal studies. The physicochemical data indicate that the ligand behaves as tridentate with ONO donor sequence towards the metal ions, and trigonal bipyramidal geometry was assigned for complexes. The ligand and its metal complexes were evaluated for their in vivo anti‐inflammatory and analgesic activity. The tested compounds have shown excellent activity, which are almost e... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5464724 Tue, 29 Nov 2011 05:00:00 +0100 5464724 http://www.medworm.com/index.php?rid=5464723&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1851 This paper reports an efficient synthesis of 4‐heteroaryl‐substituted triphenylamine derivatives via the palladium‐catalyzed Suzuki reaction of heteroaryl halides with 4‐(diphenylamino)phenylboronic acid in ethylene glycol under ligand‐free and aerobic conditions. These derivatives are important structural motifs for use in dye‐sensitized solar cells and organic electroluminescence materials. Copyright © 2011 John Wiley & Sons, Ltd.This paper reports an efficient synthesis of 4‐heteroaryl‐substituted triphenylamine derivatives via the palladium‐catalyzed Suzuki reaction of heteroaryl halides with 4‐(diphenylamino)phenylboronic acid in ethylene glycol under ligand‐free and aerobic conditions. These derivatives are important structural motifs for the use in dye‐s... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5464723 Tue, 29 Nov 2011 05:00:00 +0100 5464723 http://www.medworm.com/index.php?rid=5500776&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1858 Aromatic amines is not used commonly in allylic amination, presumably because of their less nucleophilic nature compared with the more extensively used benzylamine or relatively stable anionic nitrogen nucleophiles. An eco‐friendly method for C–O bond activation of allylic acetates using palladium associated with ligands in water leading to N‐allylation was described in this study. The palladium‐catalyzed allylic amination of allylic acetate with aminonaphthalenes gave 34–95% yields to the corresponding N‐allylic aminonaphthalenes. Copyright © 2011 John Wiley & Sons, Ltd.An eco‐friendly method for C‐N bond formation of allylic acetates using palladium associated with ligands in water leading to N‐allylation was described. (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5500776 Tue, 01 Nov 2011 04:00:00 +0100 5500776 http://www.medworm.com/index.php?rid=5464722&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1854 MCM‐41‐supported tridentate nitrogen palladium(II) complex [MCM‐41‐3 N‐Pd(II)] was conveniently synthesized from commercially available and cheap 3‐(2‐aminoethylamino)propyltrimethoxysilane via immobilization on MCM‐41, followed by reacting with pyridine‐2‐carboxaldehyde and PdCl2. It was found that this palladium complex is an excellent catalyst for the Suzuki–Miyaura coupling reaction of aryl bromides on two points: (i) the use of 5 × 10−4 mol equiv. of MCM‐41‐3 N‐Pd(II) under air afforded the coupling products efficiently after easy workup; (2) the catalyst can be reused many times without loss of catalytic activity. Copyright © 2011 John Wiley & Sons, Ltd.MCM‐41‐supported tridentate nitrogen palladium(II) complex [MCM‐41‐3N‐Pd(II)... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5464722 Tue, 01 Nov 2011 04:00:00 +0100 5464722 http://www.medworm.com/index.php?rid=5396238&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1850 (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5396238 Tue, 01 Nov 2011 04:00:00 +0100 5396238 http://www.medworm.com/index.php?rid=5374471&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1824 Synthesis of novel water‐soluble monotosylated ethylenediamines and their application in ruthenium and iridium‐catalyzed transfer hydrogenation of aldehydes are described. Various aldehydes, including electron‐deficient and electron‐rich variants, were reduced with high conversions and chemoselectivity using sodium formate as a hydrogen source in neat water. Copyright © 2011 John Wiley & Sons, Ltd. Novel water‐soluble monotosylated ethylenediamines were synthesized from ethylenediamine and shown to act as ligands for ruthenium and iridium‐catalyzed transfer hydrogenation of aldehydes in neat water using sodium formate as the hydrogen source. (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5374471 Tue, 01 Nov 2011 04:00:00 +0100 5374471 http://www.medworm.com/index.php?rid=5310379&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1846 The synthesis and characterization of copper(I) complexes of the novel pyridine‐containing macrocyclic ligand (PC‐L) and their use as catalysts in the Henry reaction are reported. The pyridine‐based 12‐membered tetraaza macrocyclic (PC‐L) ligand 1 can be obtained in good overall yield (85%) from commercially available starting materials. The Cu(I) complexes showed good catalytic activities in the Henry reaction of different aldehydes and nitroalkanes. Remarkable diastereoselectivity was observed when isatine was reacted with nitroethane under catalytic conditions. Copyright © 2011 John Wiley & Sons, Ltd.The synthesis and characterisation of copper(I) complexes of the novel pyridine‐containing macrocyclic ligand (PC‐L) and their use as catalysts in the Henry reaction are ... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5310379 Tue, 11 Oct 2011 04:00:00 +0100 5310379 http://www.medworm.com/index.php?rid=5310378&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1845 Sonogashira coupling of iodo‐ and bromoarenes and acetylenes using PdEnCat™ 30 in a phosphine‐, copper‐, amine‐, and microwave‐free system was developed, which allows for the preparation of a modulator of glutamate receptor mGluR5. Copyright © 2011 John Wiley & Sons, Ltd.Sonogashira coupling of iodo‐ and bromoarenes and acetylenes using PdEnCat™ 30 is a phosphine‐, copper‐, amine‐, and microwave‐free alternative in the preparation of mGluR5 modulators. (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5310378 Tue, 11 Oct 2011 04:00:00 +0100 5310378 http://www.medworm.com/index.php?rid=5310377&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1844 The CO‐bubbling effect in cycloisomerization reactions of enynes derived from monoterpenes has been studied using PtCl2, [Rh2Cl2(CO)4] and AuCl3 as catalytic systems. All the precursors are efficient catalysts for the cycloisomerization of O‐tethered enynes. The reaction proceeds through exo‐dig and endo‐dig pathways, which are consistent with the exclusive coordination of the alkyne triple bond to the metal center. The CO ligand not only increases the reaction rates but also induces significant variations in the two reaction pathways. Notably, this effect is also strongly dependent on the nature of the starting enyne. Copyright © 2011 John Wiley & Sons, Ltd.The CO effect in cycloisomerisation reactions of enynes derived from monoterpenes has been studied using PtCl2, [Rh2Cl2(... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5310377 Tue, 11 Oct 2011 04:00:00 +0100 5310377 http://www.medworm.com/index.php?rid=5310376&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1848 A simple, efficient method for oxidation of primary and secondary alcohols to the corresponding aldehydes and ketones has been developed. Using RuCl3/Et3N as catalyst, the oxidation of benzyl alcohol with oxygen could be achieved with 332 h−1 turnover frequency in the absence of solvent. The influence of versatile N‐containing additives on the catalytic efficiency has been discussed. The presence of minor water would substantially promote the catalytic efficiency, and its role in catalysis has been investigated in detail. The insensitive Hammett correlations of the substituted benzyl alcohols, the normal substrate isotope effect (kH/kD = 3.5 at 335 K), and the linear relationship between O2 pressure and turnover frequency imply that the reoxidation of the Ru(III) hydride interm... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5310376 Tue, 11 Oct 2011 04:00:00 +0100 5310376 http://www.medworm.com/index.php?rid=5310375&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1847 The oxidative coupling reactions of terminal alkynes with H‐phosphonates were explored using SiO2−NHC−Cu(II) (5.0 mol%) as catalyst at room temperature under base‐free reaction conditions. The reactions of a variety of terminal alkynes with H‐phosphonates generated the corresponding alkynylphosphonate products in good to excellent yields. In addition, SiO2−NHC−Cu(II) could be recovered and recycled for six consecutive trials without significant loss of its reactivity. Copyright © 2011 John Wiley & Sons, Ltd.The oxidative coupling reactions of terminal alkynes and H‐phosphonates were developed in the presence of SiO2–NHC−CuII2a (5.0 mol%) as a catalyst at room temperature under base‐free reaction conditions. The reactions of a variety of terminal alkynes with H�... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5310375 Sat, 01 Oct 2011 04:00:00 +0100 5310375 http://www.medworm.com/index.php?rid=5280976&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1834 AbstractTwo new dinuclear phenyltin(IV) complexes derived from N,N′‐bis(2‐hydroxybenzyl)‐1,2‐ethanebis(dithiocarbamate) ligand, [2‐HOC6H4CH2N(CS2SnPh3)CH2]2 (1) and [2‐HOC6H4CH2N(CS2SnClPh2)CH2]2 (2) have been synthesized and characterized by elemental analysis, IR and NMR (1H, 13C and 119Sn) spectra. The crystal structures of complexes 1 and 2 were determined by X‐ray single crystal diffraction and show that the dithiocarbamate ligand is coordinated to the tin atom in the anisobidentate manner and the tin atom is five‐coordinated. The coordination geometry of tin atom is best described as an intermediate between trigonal bipyramidal and square pyramidal with τ‐values of 0.63 and 0.53, respectively. Intermolecular hydrogen bonds (OH···S and OH···Cl) in 1 an... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5280976 Sat, 01 Oct 2011 04:00:00 +0100 5280976 http://www.medworm.com/index.php?rid=5203645&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1825 AbstractPolymeric Si/C/O/N xerogels, with the idealized polymer network structure comprising [SiOSi(NCN)3]n moieties, were prepared by reactions of hexachlorodisiloxane (Cl3SiOSiCl3) with bis(trimethylsilyl)carbodiimide (Me3SiNCNSiMe3, BTSC). NMR and FTIR spectra indicate the existence of ‐NCN‐ andSiOSi‐ units in the xerogels and also in the ceramic materials obtained upon pyrolysis. The feasibility of this reaction protocol was confirmed on the molecular level by the deliberate synthesis of the macrocyclic compound [SiPh2OSiPh2(NCN)]2, the crystal structure and spectroscopic data of which are reported. The influence of pyridine as a catalyst for the cross‐linking reaction was studied. The degree of cross‐linking increased ... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5203645 Fri, 09 Sep 2011 04:00:00 +0100 5203645 http://www.medworm.com/index.php?rid=5203644&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1837 AbstractA series of triorganotin chrysanthemumates (2,2‐dimethyl‐3‐(2‐methyl‐1‐propenyl)cyclopropanecarboxylates) (R3SnO2CC9H15) where R = methyl, ethyl, n‐butyl and phenyl was synthesized. The solid state structures were deduced using infrared (IR) and Mössbauer spectroscopies. The spectroscopic results indicated that all the compounds were found to be five‐coordinated in the solid state. Based on the NMR results, all the compounds are tetrahedral in solution. Larvicidal activities of the compounds were evaluated against the second instar stage of Aedes aegypti, Anopheles stephensi and Culex pipiens quinquefasciatus mosquitoes. The toxicity results indicated that these compounds of triorganotins were effective larvicides against all three species of larvae. Copyright © 2... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5203644 Fri, 09 Sep 2011 04:00:00 +0100 5203644 http://www.medworm.com/index.php?rid=5203650&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1842 AbstractCycloaurated gold(III) complexes derived from cycloaurated iminophosphorane, triphenylphosphine sulfide or selenide, or pyridylsulfonamide ligands have been assessed for their catalytic activity in the addition of 2‐methylfuran to methyl vinyl ketone. Addition of AgBF4 was generally needed for high activity, although those with coordinated atoms of high trans influence showed some activity in the absence of added Ag+. Copyright © 2011 John Wiley & Sons, Ltd.Gold(III) complexes containing cycloaurated iminophosphorane, triphenylphosphine sulfide or selenide, or pyridylsulfonamide ligands have been assessed for their catalytic activity in the addition of 2‐methylfuran to methyl vinyl ketone. (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5203650 Wed, 07 Sep 2011 04:00:00 +0100 5203650 http://www.medworm.com/index.php?rid=5203649&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1841 AbstractThe catalytic homogeneous hydrogenation of electron‐deficient alkenes (nucleophilic hydrogenation) was achieved in the presence of iridium complexes and a base as co‐catalyst. Contrary to hydrogenation of electron‐rich alkenes, which is inactivated by bases, the hydrogenation of the electron‐deficient alkenes turned out to be base activated. Here, we present a more thorough study on the capacities but also limitations of this new reaction mechanism using screenings of the reaction conditions as well as different Ir complexes and substrates. The formation of a catalytically active Ir complex is proposed. The active complex usually attacks a soft electron‐deficient atom, if more than one possibility exists (as shown by density functional theory computations). Additionally, ... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5203649 Wed, 07 Sep 2011 04:00:00 +0100 5203649 http://www.medworm.com/index.php?rid=5203648&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1839 AbstractA polymer‐supported macrocyclic Schiff base palladium complex has been synthesized. In the Heck reaction of aryl iodides and bromides with ethyl acrylate or styrene, the complex has been proved to give the corresponding products in good to excellent yields. The reaction proceeded smoothly in the presence of 0.5 mol% of catalyst in DMF within 1–4 h. Recycling studies have shown that the catalyst can be readily recovered and reused for four cycles with only a slightly decrease in its activity. Copyright © 2011 John Wiley & Sons, Ltd.A polymer‐supported macrocyclic Schiff base palladium complex has been synthesized and proved to be an efficient catalyst for the Heck reaction. The reaction proceeded smoothly in the presence of 0.5 mol% of catalyst in DMF within 1–4 h. Recy... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5203648 Wed, 07 Sep 2011 04:00:00 +0100 5203648 http://www.medworm.com/index.php?rid=5203647&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1838 AbstractStreptomycin has been used to derive organic metal complexes (OMCs) after metallation with ZnCl2, CdCl2 and PbCl2 and characterized by elemental analysis, electronic and vibrational spectroscopy, 1H and 13C NMR, mass spectroscopy (time‐of‐flight MS), magnetic measurement, thermal decomposition analysis (TGA, DTA), molecular modeling and X‐ray powder diffraction. OMCs are monomeric. Crystal system, lattice parameters, unit cell, particle size and volume of crystalline OMCs have been determined using X‐ray powder diffraction pattern analysis. The geometries of complexes were optimized on the basis of molecular modeling. Kinetic parameters were computed from thermal analysis, confirming first‐order kinetics. Molecular models have been optimized by MM2 calculations. Architect... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5203647 Wed, 07 Sep 2011 04:00:00 +0100 5203647 http://www.medworm.com/index.php?rid=5203646&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1823 AbstractA series of tri‐ and diorganotin(IV) compounds containing potentially chelating S,N‐ligand(s) (LSN, where LSN is 6‐phenylpyridazine‐3‐thiolate) were prepared and structurally characterized by multinuclear NMR spectroscopy. X‐ray diffraction techniques were used for determination of the structure of compounds containing one [(LSN)Ph2SnCl], two [(n‐Bu)2Sn(LSN)2] and the combination of two LSN and one LCN [(LCN)(n‐Bu)Sn(LSN)2] (where LCN is {2‐[(CH3)2NCH2]C6H4}‐) ligands. The coordination number of the tin atom varies from five to seven and is dependent on the number of chelating ligands present. The formation of the five‐membered azastanna heterocycle is favored over the formation of four‐membered azastannathia heterocycle in compounds containing both types of... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5203646 Wed, 07 Sep 2011 04:00:00 +0100 5203646 http://www.medworm.com/index.php?rid=5203654&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1836 AbstractThe efficiency and applicability of three different methods to synthesize polystannanes with different side chains are described. By means of dehydrogenative coupling utilizing the transition metal catalyst RhCl(PPh3)3 (Wilkinson's catalyst), n‐Bu2SnH2 reached the highest molar masses. Dehydrogenetive coupling in the presence of tetramethylethylenediamine could be best employed for (4‐n‐BuPh)2SnH2. Wurtz coupling using sodium in liquid ammonia was best suited for Ph2SnCl2. Next to the above‐mentioned educts, n‐Bu(Ph)SnX2 (X = H or Cl (as appropriate for the particular route) was used for polymerization resulting in one of so far rare example of asymmetric polystannanes with high molecular masses. Copyright © 2011 John Wiley & Sons, Ltd.The efficiency and applicabilit... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5203654 Tue, 06 Sep 2011 04:00:00 +0100 5203654 http://www.medworm.com/index.php?rid=5203653&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1835 AbstractCu(II) complexes of 14‐membered hexaaza macrocyclic ligand with C‐methyl substituent of the type [CuL](X)2 (where L = 3,10‐bisbenzyl‐6,13‐dimethyl‐1,3,5,8,10,12‐hexaazacyclotetradecane, and X = ClO4−, PF6−) were synthesized by tandem reaction. They were characterized by spectral and single‐crystal X‐ray diffraction techniques. The complexes show distorted octahedral geometry and the counter ions are weakly coordinated to the metal ion at the axial positions. The macrocyclic ring adopts the trans‐III configuration with six‐ and five‐membered chelate rings in chair and gauche conformation, respectively. It was observed that in the solid state the arrangement of the coordination sphere is distorted octahedral whereas, in solution, a square‐planar structur... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5203653 Tue, 06 Sep 2011 04:00:00 +0100 5203653 http://www.medworm.com/index.php?rid=5203652&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1833 AbstractBiologically active triazole Schiff bases (L1L3) derived from the reaction of 3‐amino‐1,2,4‐triazole with chloro‐, bromo‐ and nitro‐ substituted salicylaldehydes and their Zn(II) complexes (1–3) have been synthesized and characterized by their physical, spectral and analytical data. Triazole Schiff bases potentially act as tridentate ligands and coordinate with the Zn(II) metal atom through salicylidene‐O, azomethine‐N and triazole‐N. The complexes have the general formula [M(L‐H)2], where M = zinc(II) and L = (L1–L3), and observe an octahedral geometry. The Schiff bases and their Zn(II) complexes have been screened for in‐vitro antibacterial, antifungal and brine shrimp bioassay. The biological activity data show the Zn(II) complexes to be more potent ... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5203652 Tue, 06 Sep 2011 04:00:00 +0100 5203652 http://www.medworm.com/index.php?rid=5203651&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1832 AbstractAryl alkyl‐, heteroaryl alkyl‐ and dialkyl ketones were readily reduced to their corresponding secondary alcohols in high yields, using the commercially available and inexpensive polymeric silane polymethylhydrosiloxane (PMHS), as reducing agent. The reaction is catalyzed by an in situ‐generated iron complex, conveniently generated from iron(II) acetate and the commercially available N‐heterocyclic carbene (NHC) precursor IPr·HCl. Copyright © 2011 John Wiley & Sons, Ltd.Aryl alkyl‐, heteroaryl alkyl‐, and dialkyl ketones were readily reduced to their corresponding secondary alcohols in high yields, using the commercially available and inexpensive polymeric silane polymethylhydrosiloxane, as reducing agent. The reaction is catalyzed by an in situ‐generated iron c... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5203651 Tue, 06 Sep 2011 04:00:00 +0100 5203651 http://www.medworm.com/index.php?rid=5203643&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1840 (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5203643 Thu, 01 Sep 2011 04:00:00 +0100 5203643 http://www.medworm.com/index.php?rid=5116745&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1814 (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5116745 Tue, 09 Aug 2011 23:00:00 +0100 5116745 http://www.medworm.com/index.php?rid=5116744&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1827 AbstractA new cytectrene prototype of general formula RCpTc(CO)3 (R = C6H5NHCO, Cp = cyclopentadienyl moiety) has been synthesized from N‐phenylferrocenecarboxamide 2, characterized and evaluated as a potential brain perfusion imaging agent. An improved procedure has been developed to obtain both the ligand 2, characterized by its solid‐state structure (orthorhombic, Pccn, a = 10.4443(2) Å, b = 26.1467(6) Å, c = 9.9977(3) Å), and the corresponding metallic Tc‐ and Re‐complexes in good yield. These latter complexes possessed similar HPLC retention times, thereby indicating identity of their molecular structures. The Tc‐complex 99mTc‐2 is lipophilic enough to cross the blood‐brain barrier. This complex exhibits good brain uptake (1.41% injected dose per gram tissue at 5 min)... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5116744 Tue, 09 Aug 2011 23:00:00 +0100 5116744 http://www.medworm.com/index.php?rid=5116743&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1829 AbstractSecondary alcohols are coupled with aldehydes in dioxane in the presence of a catalytic amount of a ruthenium catalyst along with KOH to give coupled ketones or coupled secondary alcohols depending on the molar ratio of secondary alcohols to aldehydes and the presence (or absence) of a sacrificial hydrogen acceptor. Copyright © 2011 John Wiley & Sons, Ltd.Secondary alcohols react with aldehydes in the presence of a catalytic amount of a ruthenium catalyst along with KOH to give coupled ketones or coupled secondary alcohols according to reaction conditions. (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5116743 Tue, 09 Aug 2011 23:00:00 +0100 5116743 http://www.medworm.com/index.php?rid=5116742&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1830 AbstractA novel palladium catalyst immobilized on polyacrylonitrile fiber mats (Pd/PAN) was prepared by electrospinning. The catalytic activity and recyclability of the microwave‐assisted Pd/PAN fiber mats were examined for the Mizoroki–Heck cross‐coupling of aryl iodides with three different acrylates in aqueous solution. The morphology of the prepared Pd/PAN fiber mats was characterized by scanning electron microscopy. The large size of the PAN fiber mat‐supported palladium catalyst enables much easier separation from the reaction mixture by simple filtration. Density functional theory calculation indicates that the chelation energy of palladium chloride (PdCl2) with propionitrile (model of PAN) is considerable smaller than that of PdCl2 with water, suggesting that the stability ... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5116742 Tue, 09 Aug 2011 23:00:00 +0100 5116742 http://www.medworm.com/index.php?rid=5116741&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1817 AbstractThe Cu(II) complexes of type [Cu(cpf)(An)Cl] (An = terpyridines, cpf = ciprofloxacin) were synthesized and characterized using IR, mass and reflectance spectra. The free ligands and their complexes were evaluated for their in‐vitro antimicrobial activity against a panel of Gram‐positive and Gram‐negative bacteria. The complexes exhibit better or equal inhibition in comparison to free fluoroquinolones. Binding interactions of the complexes with calf thymus (CT DNA) were investigated by absorption titration, viscosity studies and DNA melting temperature experiment. The cleavage reaction on pUC19 DNA was monitored by agarose gel electrophoresis. The lower concentration of the complexes was catalysed the dismutation of superoxide radical at biological pH, which indicates that the... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5116741 Tue, 09 Aug 2011 23:00:00 +0100 5116741 http://www.medworm.com/index.php?rid=5116740&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1821 AbstractThe direct patterning of poly(p‐methoxyphenylmethylsilane) (PMPMS) and poly(p‐methoxyphenylmethylgermane) (PMPMG) by interference lithography is reported. Copyright © 2011 John Wiley & Sons, Ltd.The direct patterning of poly(p‐meth‐oxyphenylmethylsilane) (PMPMS) and poly(p‐methoxyphenylmethylger‐mane) (PMPMG) by interference lithography is reported. (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5116740 Tue, 09 Aug 2011 23:00:00 +0100 5116740 http://www.medworm.com/index.php?rid=5116739&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1813 AbstractSeries of new tin complexes are synthesized by classical thermal and microwave‐irradiated techniques. The biologically potent ligands 3‐formyl‐4‐chlorocoumarin semicarbazone (L1H) and 3‐formyl‐4‐chlorocoumarin thiosemicarbazone (L2H), were prepared by the condensation of semicarbazide hydrochloride and thiosemicarbazide in ethanol with the particular ketone by using microwave as well as conventional methods. The tin(IV) complexes have been prepared by mixing Ph3SnCl/Me3SnCl/Me2SnCl2 in 1:1 and 1:2 molar ratios with monofunctional bidentate ligands. The structures of the ligands and their tin complexes were confirmed by the elemental analysis, melting point determinations, molecular weight determinations, IR, 1H NMR, 13C NMR, 119Sn NMR, UV, mass spectral and X‐ray po... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5116739 Tue, 09 Aug 2011 23:00:00 +0100 5116739 http://www.medworm.com/index.php?rid=5116738&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1820 AbstractPolyhedral oligomeric silsesquioxane (POSS) polymers were synthesized by the dehydrogenative condensation of (HSiO3/2)8 with water in the presence of diethylhydroxylamine followed by trimethylsilylation. Coating films were prepared by spin‐coating of the coating solution prepared by the dehydrogenative condensation of POSS. The hardness of the coating films was evaluated using a pencil‐hardness test and was found to increase up to 8H with increases in the curing temperature. Free‐standing film and silica gel powder were prepared by aging the coating solution at room temperature. The silica gel powder was subjected to heat treatment under air atmosphere to show a specific surface area of 440 m2 g−1 at 100 °C, which showed a maximum at 400 °C as 550 m2 g−1. Copyright © 2... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5116738 Tue, 09 Aug 2011 23:00:00 +0100 5116738 http://www.medworm.com/index.php?rid=5116737&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1831 AbstractA variety of novel copper complexes were synthesized and characterized of the formulae [Cu(L1)(OAc)], [CuL2(H2O)], [CuL3(H2O)], [CuL4(OAc)], [CuL5(H2O)] [CuL6], [CuL7], [CuL8](OAc) and [CuL9], where L1L9 represents Schiff base ligands [derived by the condensation of 5‐hydroxyflavone with 4‐aminoantipyrine (L1), o‐aminophenol (L2), o‐aminobenzoic acid (L3), o‐aminothiazole (L4), thiosemicarbazide (L5), 4‐aminoantipyrine‐o‐aminophenol (L6), 4‐aminoantipyrine‐o‐aminobenzoic acid (L7), 4‐aminoantipyrine‐o‐aminothiazole(L8) and 4‐aminoantipyrine‐thiosemicarbazide (L9)]. The spectral and magnetic results of the Cu(II) complexes exhibit square planar geometry. The DNA binding properties of copper complexes were studied by using electronic absorption spec... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5116737 Tue, 09 Aug 2011 23:00:00 +0100 5116737 http://www.medworm.com/index.php?rid=5116736&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1822 AbstractThe reaction of benzylthioarylboronic acids protected as N‐butyldiethanolamine esters or as triisopropoxyborates with organolithium bases or lithium diisopropylamide (LDA) has been investigated. The benzylic lithiation occurs selectively using LDA at − 68 °C. The stability of the resultant borio‐lithio intermediates is strongly influenced by the position of the boron atom in the phenyl ring. The reaction with various electrophiles affords new arylboronic acids substituted in the benzylic position. Copyright © 2011 John Wiley & Sons, Ltd.The reaction of benzylthioarylboronic acids protected as N‐butyldi‐ethanolamine esters or as triisopropoxyborates with organolithium bases or LDA has been investigated. The benzylic lithiation occurs selectively using LDA at ‐68 C.... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5116736 Tue, 09 Aug 2011 23:00:00 +0100 5116736 http://www.medworm.com/index.php?rid=5116735&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1826 AbstractAn efficient and facile protocol for the annulation of o‐halobenzaldehyde derivatives with diverse internal alkynes has been developed using cyclopalladated ferrocenylimine as the catalyst, and the indenones as the products could be obtained in moderate to good yields. It was found for the first time that the addition of benzoic acid could remarkably speed up the reaction process. Copyright © 2011 John Wiley & Sons, Ltd.An efficient and facile protocol for palladacycle‐catalyzed annulation of o‐halobenzaldehydes with internal alkynes was developed, affording indenones in moderate to good yields. The addition of benzoic acid could remarkably enhance the reaction rate. (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5116735 Tue, 09 Aug 2011 23:00:00 +0100 5116735 http://www.medworm.com/index.php?rid=5129766&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1770 (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5129766 Sun, 31 Jul 2011 23:00:00 +0100 5129766 http://www.medworm.com/index.php?rid=5124227&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1815 (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5124227 Sun, 31 Jul 2011 23:00:00 +0100 5124227 http://www.medworm.com/index.php?rid=5116734&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1828 AbstractIn the present work, the application of electron‐deficient tetraphenylporphyrinatovanadium(IV) trifluoromethanesulfonate, [VIV(TPP)(OTf)2], in the trimethylsilylation of alcohols and phenols with hexamethydisilazane (HMDS) is reported. This new V(IV) catalyst was used as an efficient catalyst for silylation of not only primary alcohols but also sterically hindered secondary and tertiary alcohols with HMDS. Trimethylsilylation of phenols with HMDS was also performed to afford the desired Trimethylsilyl ethers (TMS) ethers. The chemoselectivity of this method was also investigated. This catalyst can be reused several times without loss of its activity. Copyright © 2011 John Wiley & Sons, Ltd.The application of electron‐deficient [VIV(TPP)(OTf)2], in the trimethylsilylation o... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5116734 Sun, 31 Jul 2011 23:00:00 +0100 5116734 http://www.medworm.com/index.php?rid=5017439&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1809 AbstractCross‐linked poly(4‐vinylpyridine/styrene) copolymer‐supported bismuth(III) triflate (30P/S‐Bi) effectively activates hexamethyldisilazane (HMDS) for the silylation of alcohols and phenols. By the use of this heterogeneous catalytic system, a wide range of alcohols as well as phenols are converted into their corresponding trimethylsilyl ethers in high yield under mild reaction conditions. The catalyst was reused more than 10 times without significant loss of its catalytic activity. Copyright © 2011 John Wiley & Sons, Ltd.Cross‐linked poly(4‐vinylpyridine/styrene) copolymer‐supported bismuth(III) triflate (30P/S‐Bi) was effectively utilized in the trimethylsilylation of various alcohols and phenols with hexamethyldisilazane (HMDS). (Source: Applied Organometalli... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5017439 Thu, 07 Jul 2011 23:00:00 +0100 5017439 http://www.medworm.com/index.php?rid=5017438&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1816 AbstractA concise, convenient and mild route for one‐pot regioselective synthesis of N‐aryl‐ and N‐alkyltriazoles in water as a sole solvent is reported. The methodology involves a three‐component reaction comprising aryl/alkyl‐alkyne, sodium azide and aryl/alkyl/allyl halide catalyzed by zinc(II) L‐prolinate. Prominent features of our protocol are incorporation of transition metal catalyst other than copper, water as the reaction medium, recyclability of catalyst and avoidance of hazardous aryl azide as a reactant. Copyright © 2011 John Wiley & Sons, Ltd.A concise, convenient and mild route for one‐pot syntheses of N‐aryl‐ and N‐alkyltriazoles in water as a sole solvent is reported. Moreover the catalyst involved, zinc(II) L‐prolinate, is characterized by powd... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5017438 Thu, 07 Jul 2011 23:00:00 +0100 5017438 http://www.medworm.com/index.php?rid=5017437&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1818 AbstractThree Ru–η6‐benzene–phosphine complexes bearing tri‐(p‐methoxyphenyl)phosphine, triphenylphosphine and tri‐(p‐trifluoromethylphenyl)phosphine were synthesized and characterized by 31P{1H} NMR, 1H NMR, 13C{1H} NMR and elemental analyses. Complex 1 was further identified by X‐ray crystallography. These complexes exhibit good to excellent activities for the transfer hydrogenation of ketones in refluxing 2‐propanol, and the highest turnover frequency (TOF) is up to 5940 h−1. The effect of electronic factors of these complexes on the transfer hydrogenation of ketones reveals that the catalytic activity is promoted by electron‐donating phosphine and the catalyst stability is improved by electron‐withdrawing phosphine. Copyright © 2011 John Wiley & Sons, Ltd.... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5017437 Thu, 07 Jul 2011 23:00:00 +0100 5017437 http://www.medworm.com/index.php?rid=5017436&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1819 AbstractThis paper presents two facile methods to achieve functionalization of isotactic polypropylene (i‐PP) by azide and alkyne groups. One method comprises metallocene‐catalyzed isospecific propylene polymerization with dialkylzinc as chain transfer agent to produce iodo‐terminated i‐PP, which can be transformed to azide‐terminated i‐PP. The other utilizes hydroxyl‐grafted i‐PP as a raw material to react with bis(trichloromethyl)carbonate and propargyl amine, generating grafted alkyne groups. Both approaches are effective, controllable and safe. The azide‐terminated and alkyne‐grafted i‐PP are readily applicable to click chemistry for construction of new i‐PP architecture, e.g. long‐chain branched i‐PP. Copyright © 2011 John Wiley & Sons, Ltd.Two facile ... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5017436 Thu, 07 Jul 2011 23:00:00 +0100 5017436 http://www.medworm.com/index.php?rid=5017435&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1811 (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5017435 Thu, 07 Jul 2011 23:00:00 +0100 5017435 http://www.medworm.com/index.php?rid=5017434&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1812 (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=5017434 Thu, 30 Jun 2011 23:00:00 +0100 5017434 http://www.medworm.com/index.php?rid=4974438&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1797 (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4974438 Tue, 28 Jun 2011 17:29:01 +0100 4974438 http://www.medworm.com/index.php?rid=4891284&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1804 AbstractThe activity of [Pd(C6H4CH2NH2‐κ2‐C‐N)PPh3MOBPPY]OTf complex, A (MOBPPY = 4‐methoxybenzoylmethylenetriphenylphosphoraneylide) was investigated in the homocoupling reaction of a vast range of aryl halides under both conventional and microwave irradiation conditions and their results were compared. The complex was active and showed high efficiency in the formation of new C‐C bonds. The yields were excellent using a catalytic amount of [Pd(C6H4CH2NH2‐κ2‐C‐N)PPh3MOBPPY]OTf complex in N, N‐dimethylformamide at 120 °C. In comparison to conventional heating conditions, the reactions under microwave irradiation gave higher yields in shorter reaction times. Copyright © 2011 John Wiley & Sons, Ltd.Application of monomeric complex of 4‐methoxybenzoylmethylenetriphe... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4891284 Tue, 31 May 2011 23:00:00 +0100 4891284 http://www.medworm.com/index.php?rid=4891283&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1805 AbstractAn extensive study of fluorescence‐detected X‐ray absorption near‐edge structure (XANES) spectroscopy, with the purpose of realizing site‐selectivity, applied to smoothly oxidized cobalt nanoparticles is presented. For this, resonant inelastic X‐ray scattering (RIXS) planes of the nanoparticles were recorded using high‐resolution detection of Kβ emission. The Kβ line represents a superposition of emission lines that correspond to different homovalent compounds inherent in the nanoparticle and that are energetically different. Therefore Co K‐edge XANES spectra, extracted from distinct emission energies of the RIXS planes, show partial valence‐selectivity, which by assuming a simple core–shell model for our nanoparticle, turns over to partial site‐selectivity. T... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4891283 Tue, 31 May 2011 23:00:00 +0100 4891283 http://www.medworm.com/index.php?rid=4891282&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1806 AbstractA new and efficient method for the synthesis of a variety of N‐substituted pyrroles from condensation reactions of 2,5‐hexanedione with amines or diamines using ZrOCl2·8H2O as a water‐tolerant Lewis acid catalyst at room temperature is described.The use of nontoxic, inexpensive, easily available and reusable catalyst under solvent‐free conditions make this protocol practical, environmentally friendly and economically attractive. Copyright © 2011 John Wiley & Sons, Ltd.ZrOCl2·8H2O has been found to be a mild and very effective catalyst for the synthesis of a variety of N‐substituted pyrroles through the condensation reactions of 2,5‐hexanedione with amines or diamines under solvent‐free conditions. (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4891282 Tue, 31 May 2011 23:00:00 +0100 4891282 http://www.medworm.com/index.php?rid=4891281&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1810 AbstractA new strategy to significantly improve the efficiency of Suzuki reactions was achieved under microwave irradiation. [Cl2Pd(COD)]/piperazine derivative 1 catalyzed aryl chlorides with phenylboronic acid in methanol (50%) affording excellent yields under aerobic conditions. Application of this strategy to the synthesis of liquid crystal material is also described. Copyright © 2011 John Wiley & Sons, Ltd.[Cl2Pd(COD)]/piperazine derivative‐catalyzed aryl chlorides afforded excellent yields under microwave irradiation. Application of this strategy to the synthesis of liquid crystal material is also described, with high isolated yield (95%) in just 10 min. (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4891281 Tue, 31 May 2011 23:00:00 +0100 4891281 http://www.medworm.com/index.php?rid=4882545&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1802 AbstractA polymeric manganese(II) complex with the general formula [Mn(O2CCH2NH2CH2CO2)2(H2O)2]n from reaction of iminodiacetatic acid and manganese(II) perchlorate under nitrogen in water, was synthesized and characterized. The structure of the complex was determined using single‐crystal X‐ray diffraction, elemental analysis, IR and UV‐vis spectra. This complex exhibited excellent catalytic activity and selectivity for oxidation of various alcohols and sulfides to the corresponding aldehydes/ketone and sulfoxides using urea hydrogen peroxide and oxone (2KHSO5·KHSO4·K2SO4), respectively, as oxidants under air at room temperature. The easy preparation, mild reaction conditions, high yields of the products, short reaction time, no over‐oxidation products, high selectivity and inexp... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4882545 Tue, 31 May 2011 22:25:36 +0100 4882545 http://www.medworm.com/index.php?rid=4882546&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1808 AbstractA series of in situ‐generated ruthenium hydride complexes Ru(PPh3)2(CO)H(Ln) (n = a–h) incorporating a Schiff base ligand was investigated for the isomerization of olefins. 1H‐NMR was used to characterize the new hydride species in combination with 31P‐NMR. Allylbenzene and 1‐octene were used as model substrates. Temperature, solvents and catalyst/substrate mole ratio were taken into account as parameters to optimize the isomerization reaction. All catalysts showed the best performance in 2‐butanol, suggesting that the catalytic activity depends not only strongly on the steric and electronic environment of the ruthenium but also on the chosen solvent. Copyright © 2011 John Wiley & Sons, Ltd.A series of in situ‐generated ruthenium hydride complexes Ru(PPh3)2(CO)H(... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4882546 Sun, 29 May 2011 23:00:00 +0100 4882546 http://www.medworm.com/index.php?rid=4839278&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1807 AbstractSulfonamide‐derived new ligands, 4‐({[(E)‐(5‐bromo‐2‐hydroxyphenyl)methylidene]‐amino}methyl)benzenesulfonamide and 4‐bromo‐2‐((E)‐{4‐[(3,4‐dimethylisoxazol‐5‐yl)sulfamoyl]phenyl}iminiomethyl)phenolate and their transition metal [cobalt(II), copper(II), nickel(II) and zinc(II)] complexes were synthesized and characterized. The nature of bonding and structure of all the synthesized compounds were deduced from physical (magnetic susceptibility and conductivity measurements), spectral (IR, 1H and 13C NMR, electronic, mass spectrometry) and analytical (CHN analysis) data. The structure of the ligand, 4‐bromo‐2‐((E)‐{4‐[(3,4‐dimethylisoxazol‐5‐yl)sulfamoyl]phenyl} iminiomethyl)phenolate was also determined by X‐ray diffraction method. An o... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4839278 Thu, 19 May 2011 19:10:20 +0100 4839278 http://www.medworm.com/index.php?rid=4839280&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1796 AbstractA new cyclometalated Ir(III) complex [Ir(ppy)2(hdppz)]PF6 (Hppy = 2‐phenylpyridine and hdppz = 6‐hydroxydipyrido[3,2‐a:2′,3′‐c]phenazine) was synthesized and characterized. The pH effects on the UV–vis absorption spectra were studied and ground‐state acid ionization constant pKa values of the complex were derived. The calf thymus DNA (ct‐DNA) binding properties of the complex were investigated with UV‐vis absorption spectrophotometric titrations, DNA competitive binding with ethidium bromide, DNA melting experiments, viscosity measurements and density functional theory (DFT) calculations. The complex was demonstrated to act as a ct‐DNA intercalator with a large DNA binding constant value of (6.06 ± 0.32) × 106M−1 in 50 mM NaCl. The avid DNA binding affinit... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4839280 Mon, 16 May 2011 23:00:00 +0100 4839280 http://www.medworm.com/index.php?rid=4839279&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1797 (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4839279 Mon, 16 May 2011 23:00:00 +0100 4839279 http://www.medworm.com/index.php?rid=4787887&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1798 AbstractRice hull ash (RHA) was converted to amorphous silica gel using a modified version of published literature procedures. The gels were characterized by a comparison of their Cross Polarization Magic Angle Spinning 29Si NMR and scanning electron microscopy images with commercial silica gels. The resulting gels were silanized with a 7.5:1 mixture of methyltrichlorosilane and chloropropyltrichlorosilane and then reacted with poly(allylamine) (PAA) to produce the silica polyamine composite (SPC) BP‐1. The BP‐1 was then further modified with pyridine‐2‐carboxaldehyde to form the copper‐selective SPC, CuSelect. This procedure follows that used to produce the commercialized version of these composite materials from commercially available amorphous silica gels. The composites were ... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4787887 Wed, 04 May 2011 23:00:00 +0100 4787887 http://www.medworm.com/index.php?rid=4787886&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1799 AbstractA new protocol has been developed for the synthesis of arylboronates by a coupling reaction of aryl halides and bis(pinacolato)diboron using bis(triphenylphosphine)palladium dichloride/sodium acetate/polyethylene glycol 600 [Pd(PPh3)2Cl2/NaOAc/PEG 600] as an efficient catalytic system. Copyright © 2011 John Wiley & Sons, Ltd.A new protocol has been developed for the synthesis of arylboronates by a coupling reaction of aryl halides and bis(pinacolato)diboron using bis(triphenylphosphine)palladium dichloride/sodium acetate/polyethylene glycol 600 [Pd(PPh3)2Cl2/NaOAc/PEG 600] as an efficient catalytic system. (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4787886 Wed, 04 May 2011 23:00:00 +0100 4787886 http://www.medworm.com/index.php?rid=4787885&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1803 (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4787885 Wed, 04 May 2011 23:00:00 +0100 4787885 http://www.medworm.com/index.php?rid=4787884&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1787 AbstractVarious aromatic, aliphatic and conjugated aldehydes were transformed to the corresponding carboxylic acids with 70% t‐BuOOH solution (water) in the presence of catalytic amounts (10 mol%) of Mohr's salt. This method possesses functional group compatibility, does not involve cumbersome work‐up, exhibits chemoselectivity since other functional groups remain intact and proceeds under mild conditions. The resulting products are obtained in good yields within reasonable times. Copyright © 2011 John Wiley & Sons, Ltd.A cheap and efficient method for the oxidation of a variety of aromatic, aliphatic and conjugated aldehydes using 70% t‐BuOOH as oxidant in the presence of catalytic amounts of Mohr's salt is described. (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4787884 Wed, 04 May 2011 23:00:00 +0100 4787884 http://www.medworm.com/index.php?rid=4787883&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1801 AbstractThe reaction of p‐(N,N‐dimethylaminophenyl)diphenylphosphine [PPh2(p‐C6H4NMe2)] with [Fe3(CO)12], [Rh(CO)2Cl]2 and PdCl2 resulted in three new mononuclear complexes, {Fe(CO)4[η1‐(P)‐PPh2(p‐C6H4NMe2)]} (1a), trans‐{Rh(CO)Cl[η1‐(P)‐PPh2(p‐C6H4NMe2)]2} (2) and trans‐{PdCl2[η1‐(P)‐PPh2(p‐C6H4NMe2)]2} (3), respectively. A small amount of dinuclear nonmetal‐metal bonded complex, {Fe2(CO)8[µ‐(P,N)‐PPh2(p‐C6H4NMe2)]} (1b), was also isolated as a side product in the reaction of [Fe3(CO)12]. The complexes were characterized by elemental analyses, mass, IR, UV–vis, 1H, 13C (except 1b) and 31P{1H} NMR spectroscopy. The Pd complex 3 effectively catalyzes the Suzuki–Miyaura cross‐coupling reactions of aryl halides with arylboronic acids in water–is... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4787883 Wed, 04 May 2011 23:00:00 +0100 4787883 http://www.medworm.com/index.php?rid=4787882&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1800 AbstractThe activity of {Pd[C6H2(CH2CH2NH2)‐(OMe)2,3,4] (µ‐Br)}2 complex was investigated in the Heck–Mizoroki CC cross‐coupling reaction under conventional heating and microwave irradiation conditions in molten salt tetrabutylammonium bromide as the solvent and promoter at 130 °C. This complex in these conditions is an active and efficient catalyst for the Heck reaction of aryl iodides, bromides and even chlorides, and also arenesulfonyl chlorides. Copyright © 2011 John Wiley & Sons, Ltd.The activity of {Pd[C6H2(CH2CH2NH2)‐(OMe)2,3,4] (µ‐Br)}2 complex was investigated in the Heck–Mizoroki CC cross‐coupling reaction under conventional heating and microwave irradiation conditions in molten salt tetrabutylammonium bromide as the solvent and promoter at 130 °C. ... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4787882 Wed, 04 May 2011 23:00:00 +0100 4787882 http://www.medworm.com/index.php?rid=4787881&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1793 AbstractAs alternatives to the common tertiary phosphine/Pd systems, well‐defined N‐heterocyclic carbene–Pd complexes have been proven to be highly efficient precatalysts for intermolecular direct annalution of o‐haloanilines and ketones at lower catalyst loadings. A highly efficient and practical protocol for synthesis of functionalized indoles was developed using (IPr)Pd(acac)Cl as catalyst. Both o‐bromoanilines and o‐chloroanilines gave rise to efficient coupling under the reaction conditions. Related to acyclic ones, cyclic ketones coupled more effectively with o‐haloanilines. With [Pd(IPr)2] as catalyst, the base‐sensitive groups including OH and CO2H groups could be tolerated. Copyright © 2011 John Wiley & Sons, Ltd.Pd‐catalyzed intermolecular direct annulation... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4787881 Sat, 30 Apr 2011 23:00:00 +0100 4787881 http://www.medworm.com/index.php?rid=4767358&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1790 AbstractA new quinazolinone derivative, 3‐[1‐(2‐hydroxyphenyl)ethylideamino]‐2‐phenyl‐3,4‐dihydroquinazolin‐4(3H)‐one (LH) was synthesized by the condensation of 2‐hydroxyacetophenone‐2‐aminobenzoylhydrazone and benzaldehyde. The cyclization to form 1,2‐dihydroquinazolinone was confirmed by IR, 1D and 2D HETCOR studies. Coordination compounds of Co(II), Ni(II), Cu(II) and Zn(II) of LH were synthesized and characterized using various physico‐chemical studies like stoichiometric, conductivity, magnetic moment measurements and spectral techniques such as IR, NMR, UV‐vis and EPR spectroscopy. The elemental analysis and thermal studies suggested a general stoichiometry [M(HEPDQ)Cl] for all the complexes. A four‐coordinate geometry was assigned to all the complexe... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4767358 Sat, 30 Apr 2011 10:37:31 +0100 4767358 http://www.medworm.com/index.php?rid=4762104&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1786 AbstractA series of novel complexes of the type Cu(II)(Ln)2(H2O)2]•xH2O [where Ln = L1–4, these ligands being described as: L1, 2‐({4‐[6,7‐dihydrothieno[3,2‐c]pyridin‐5(4H)‐ylsulfonyl]phenylimino}methyl)phenol, x = 1; L2, 2‐({4‐[6,7‐dihydrothieno[3,2‐c] pyridin‐5(4H)‐ylsulfonyl]phenylimino}methyl)‐5‐(methoxy)phenol, x = 2; L3, 5‐chloro‐2‐({4‐[6,7‐dihydrothieno[3,2‐c]pyridin‐5(4H)‐ylsulfonyl]phenylimino}methyl)phenol, x = 2; and L4, 5‐bromo‐4‐chloro‐2‐({4‐[6,7‐dihydrothieno[3,2‐c]pyridin‐5(4H)‐ylsulfonyl]phenylimino} methyl)phenol, x = 1] was investigated. They were characterized by elemental analysis, IR, 1H‐NMR, 13C‐NMR and electronic spectra, magnetic measurements and thermal studies. The FAB‐mass spectrum of [Cu(I... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4762104 Thu, 28 Apr 2011 23:11:10 +0100 4762104 http://www.medworm.com/index.php?rid=4758014&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1795 AbstractA PdCl2‐catalyzed direct alkynylation of arylboronic acids to give diarylacetylenes is described. The optimal conditions using PdCl2 as catalyst, MeOHPhMeH2O as solvent and K2CO3 as base effectively suppressed the formation of homo‐coupling product and afforded moderate to good yield of the desired unsymmetrical coupling product. This reaction represents a Suzuki‐type sp2(CB)–sp(CX) cross‐coupling. Copyright © 2011 John Wiley & Sons, Ltd.A PdCl2‐catalyzed Suzuki reaction between arylacetylene halides (I or Br) and arylboronic acids was reported, which extended the Suzuki reaction to couple sp CX bonds with arylboronic acids, and also provided an alternative pathway to diarylacetylenes. (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4758014 Thu, 28 Apr 2011 03:01:29 +0100 4758014 http://www.medworm.com/index.php?rid=4762105&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1785 AbstractEnantioselective addition of diethylzinc to a series of aromatic aldehydes was developed using a modular amino acid amide chiral ligand (2S)‐3‐phenyl‐N‐((R)‐1‐phenyl‐ethyl)‐2‐(tosylamino)propanamide without using titanium complex. The catalytic system employing 10 mol% of 1g was found to promote the addition of diethylzinc (ZnEt2) to a wide range of aromatic aldehydes with electron‐donating and electron‐withdrawing substituents, giving up to 82% ee of the corresponding secondary alcohol under mild conditions. Copyright © 2011 John Wiley & Sons, Ltd.Enantioselective addition of diethylzinc to a series of aromatic aldehydes was developed using a modular amino acid amide chiral ligand (2S)‐3‐phenyl‐N‐((R)‐1‐phenyl‐ethyl)‐2‐(tosylamino)propa... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4762105 Wed, 27 Apr 2011 23:00:00 +0100 4762105 http://www.medworm.com/index.php?rid=4758016&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1789 AbstractA mild and rapid one‐pot process for Reformatsky and Barbier reactions using a catalytic quantity of zirconocene dichloride (Cp2ZrCl2) as a promoter and zinc as a terminal reductant at room temperature in dimethyl formamide was developed. The protocol has wide substrate suitability and afforded the desired 3‐substituted‐3‐hydroxyindolin‐2‐ones from istains in good yields and short reaction time. Copyright © 2011 John Wiley & Sons, Ltd.A mild and rapid one‐pot process for Reformatsky and Barbier reactions using a catalytic quantity of zirconocene dichloride (Cp2ZrCl2) as a promoter and zinc as a terminal reductant at room temperature in DMF was developed. The protocol has wide substrate suitability and afforded the desired 3‐substituted‐3‐hydroxyindolin‐2�... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4758016 Mon, 25 Apr 2011 23:00:00 +0100 4758016 http://www.medworm.com/index.php?rid=4758015&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1792 AbstractCleavage of a CN bond of imidazolium salt derived from N‐phenyl‐substituted proline was observed in this laboratory. A novel imidazole‐coordinated monodentate NHC–Pd(II) complex 5 was obtained as the sole product in good yield in the reaction of imidazolium salt 4 with Pd(OAc)2 in refluxing THF. The structure of complex 5 was determined unambiguously by an X‐ray diffraction. The complex was found to be a good catalyst in the cross‐coupling reaction of arylboronic acids with carboxylic acid anhydrides in water at room temperature. Copyright © 2011 John Wiley & Sons, Ltd.Imidazole‐coordinated monodentate NHC–Pd(II) complex was synthesized from proline and was found to be a good catalyst in the cross‐coupling reaction of arylboronic acids with carboxylic acid... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4758015 Mon, 25 Apr 2011 23:00:00 +0100 4758015 http://www.medworm.com/index.php?rid=4731750&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1794 AbstractThe reaction of silicon with ethanol was carried out in a gas–solid stirred fluidized bed, with cuprous chloride prepared by a wet process as the catalyst. The effect of hydrogen fluoride and ethyl chloride addition on formation of triethoxysilane in the direct process was described and discussed. The catalytic activity was evaluated using online gas chromatography, X‐ray diffraction and scanning electron microscopy to study the contact mass. The results show that the promoters hydrogen fluoride and ethyl chloride not only supplemented anions, but also depressed the catalytic activity of metallic copper. The comparison of technical‐grade silicon and polycrystalline silicon showed many differences in reactivity, reaction rate and induction period. Furthermore, the yield, selec... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4731750 Wed, 20 Apr 2011 13:22:35 +0100 4731750 http://www.medworm.com/index.php?rid=4731754&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1781 AbstractA bifunctional cobalt Salen complex containing a Lewis acid metal center and two covalent bonded Lewis bases on the ligand was designed and used for the coupling of CO2 and epoxides under mild conditions. The complex exhibited excellent activity (turnover frequency = 673/h) and selectivity (no less than 97%) for polymer formation in the copolymerization of propylene oxide (PO) and CO2 at an appropriate combination of all variables. High molecular weight of 110 200 and yield 99% were achieved at a higher [PO]/[complex] ratio of 6000:1. The complex also worked satisfactorily for the terpolymerization of CO2, PO and cyclohexene oxide (CHO), without formation of cyclic carbonate or ether linkages to give the polycarbonate. High cyclohexene carbonate unit content in the CO2/PO/CHO terpo... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4731754 Tue, 19 Apr 2011 23:00:00 +0100 4731754 http://www.medworm.com/index.php?rid=4731753&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1784 AbstractA reliable and practical procedure for FeCl3‐promoted ester cleavage has been developed. Lewis acids including TiCl4, ZnO and FeCl3 etc. were investigated as promoters for O‐alkyl cleavage of carboxylic acid ester. Under optimal reaction conditions, FeCl3 (1.5 equiv.) was found to possess the highest activity and efficiently enhanced dealkylation of aryl esters, alkyl esters and aromatic heterocyclic esters to give their corresponding carboxylic acids in 54–98% yield, the method provides a complementary access to dealkylation of ester under neutral condition. Copyright © 2011 John Wiley & Sons, Ltd.A reliable and practical procedure for FeCl3‐promoted ester cleavage has been developed. Lewis acids including TiCl4, ZnO and FeCl3 etc. were investigated as promoters for O... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4731753 Tue, 19 Apr 2011 23:00:00 +0100 4731753 http://www.medworm.com/index.php?rid=4731752&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1788 AbstractThe synthesis, characterization and ε‐caprolactone polymerization behavior of lanthanide amido complexes stabilized by ferrocene‐containing N‐aryloxo functionalized β‐ketoiminate ligand FcCOCH2C(Me)N(2‐HO‐5‐But‐C6H3) (LH2, Fc = ferrocenyl) are described. The lanthanide amido complexes [LLnN(SiMe3)2(THF)]2 [Ln = Nd (1), Sm (2), Yb (3), Y (4)] were synthesized in good yields by the amine elimination reactions of LH2 with Ln[N(SiMe3)2]3(µ‐Cl)Li(THF)3 in a 1:1 molar ratio in THF. These complexes were characterized by IR spectroscopy and elemental analysis, and 1H NMR spectroscopy was added for the analysis of complex 4. The definitive molecular structures of complexes 1 and 3 were determined by X‐ray diffraction studies. Complexes 1–4 can initiate the ring‐op... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4731752 Tue, 19 Apr 2011 23:00:00 +0100 4731752 http://www.medworm.com/index.php?rid=4731751&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1791 AbstractDialkyl and alkylene dithiophoshoric acids react with diphenyl diselenide in a 1:2 molar ratio in refluxing benzene to yield Ph2Se2HS2P(OR)2 (R = Et, Pr‐n, Pr‐i, Bu‐i and Ph) and , where G = ‐CH2CMe2CH2‐, ‐CH2CEt2CH2‐ and ‐CMe2CMe2‐. The complexes are yellow solids (in the cyclic chain) and yellow sticky solids (in the open chain), are soluble in common organic solvents and are monomeric in nature. They were characterized on the basis of elemental analyses, molecular weight determinations, IR and NMR (1H, 13C and 31P). The spectral data revealed addition of dithiophosphate moieties to the diselenide. Studies were conducted to assess the growth‐inhibiting potential of some of the synthesized complexes against various bacterial strains. Copyright © 2011 John Wile... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4731751 Tue, 19 Apr 2011 23:00:00 +0100 4731751 http://www.medworm.com/index.php?rid=4713732&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1778 We report here our observation that, using appropriate reaction conditions, the Sonogashira reaction can be performed without the need for copper catalyst and solvent. Our approach involves the use of diatomite‐supported palladium(II) salophen complex as a catalyst and triethylamine as a base. The methodology works, to differing extents, for aryl iodides and bromides. This heterogeneous catalyst can be reused at least five times without any decrease in activity. Copyright © 2011 John Wiley & Sons, Ltd.A diatomit‐supported Pd(II) salophen complex is found to be a highly active catalyst for Sonogashira coupling reactions of aryl halides with terminal alkynes. The reactions are performed under copper‐ and solvent‐free conditions in an air atmosphere. This heterogeneous catalyst c... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4713732 Fri, 15 Apr 2011 05:48:32 +0100 4713732 http://www.medworm.com/index.php?rid=4713735&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1777 AbstractA series of new diethyltin(IV) derivatives of substituted phenyl acrylates have been synthesized and characterized by elemental analysis, IR, multinuclear NMR (1H, 13C, 19F and 119Sn) and X‐ray single crystal analysis. X‐ray single crystal diffraction study of complex 8 has shown the formation of secondary O···Sn, F···H and H···O intermolecular interactions. These complexes proved to be good antitumor agents. The antitumor properties are presumably due to the intercalative mode of interaction of these complexes with the tumor cells' DNA. Copyright © 2011 John Wiley & Sons, Ltd.Structural studies of mononuclear diethyltin(IV) derivatives and their biological aspects as potential antitumor agents against Agrobacterium tumefacien cells were carried out. These complex... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4713735 Tue, 12 Apr 2011 23:00:00 +0100 4713735 http://www.medworm.com/index.php?rid=4713734&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1782 AbstractThe fluoroquinolone family member ciprofloxacin is well known for its drug design and coordinating ability towards metal ions. The coordination chemistry of this drug with metal ions of biological and pharmaceutical importance is of considerable interest. Novel Mn(III) mixed‐ligand complexes of ciprofloxacin with various bis‐pyrazolone‐based dinegative bidentate ligands were synthesized and characterized on the basis of their physical properties, magnetic susceptibility measurements, (FT‐IR and electronic) spectral studies. The FAB‐mass spectrum of [Mn(A9)(L)(H2O)2]·H2O [where H2A9 = 4,4′‐(p‐tolylmethylene)bis(3‐methyl‐1‐phenyl‐4,5‐dihydro‐1H‐pyrazol‐5‐ol) and HL = 1‐cyclopropyl‐6‐fluoro‐4‐oxo‐7‐(piperazin‐1‐yl)‐1,4‐dihydroqu... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4713734 Tue, 12 Apr 2011 23:00:00 +0100 4713734 http://www.medworm.com/index.php?rid=4713733&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1774 AbstractDihydropyrazole‐bridged dinuclear ferrocenyl derivatives (3a–3c) have been synthesized by the reaction of 1,3‐diferrocenyl‐2‐propen‐1‐on (1) with hydrazine, then acylation with acyl chloride directly. The structures were determined by mass spectrometry, IR and 1H NMR spectroscopy. The compound 3c was characterized by single‐crystal X‐ray analyses. It was found that compounds 3a–3c have significant catalytic effect on the decomposition of ammonium perchlorate (AP). Compared with the thermal decomposition of pure AP, adding 3a, 3b and 3c in AP decreases its decomposition temperature by 78.8, 74.3 and 57.1 °C, respectively. Copyright © 2011 John Wiley & Sons, Ltd.Dihydropyrazole‐bridged dinuclear ferrocenyl derivatives (3a–3c) as potentially burning rate ... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4713733 Tue, 12 Apr 2011 23:00:00 +0100 4713733 http://www.medworm.com/index.php?rid=4675743&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1783 AbstractA variety of aromatic, aliphatic and conjugated aldehydes and alcohols were transformed to the corresponding carboxylic acids and ketones with a quantitative conversion in high yields with 70% t‐BuOOH solution in water in the presence of catalytic (5 mol%) amounts of CuBr2 under room temperature conditions. The conversion of 4‐methoxybenzaldehyde to 4‐methoxybenzoic acid is extremely facile in MeCN at ambient temperature in the presence of 5 mol% CuBr2 and 2 equiv. 70% t‐BuOOH (water) as the oxidant. Oxidation with t‐BuOOH (water) alone in MeCN was found to be negligible. The scope of our catalytic system is applicable for a wide range of aromatic, conjugated and aliphatic substrates. These aldehydes were converted to the corresponding carboxylic acids in good isolated yi... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4675743 Sun, 03 Apr 2011 23:00:00 +0100 4675743 http://www.medworm.com/index.php?rid=4675742&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1776 AbstractSeveral carboxylated polyethylene glycols as promoters were applied in the platinum‐catalyzed hydrosilylation of alkenes, and polyethylene glycol maleic acid monoester as a promoter for hydrosilylation was investigated. It was found that an improvement of the selectivity was achieved in the presence of carboxylated polyethylene glycol, and the β‐adduct as major product was obtained. Additionally, the effect of alkenes and silanes employed on the selectivity was investigated; better selectivity could be achieved when (EtO)3SiH was used as the hydride than ClMe2SiH. Copyright © 2011 John Wiley & Sons, Ltd.The use of functionalized polyethylene glycol resulted in an improvement of the regioselectivity, with the β‐adduct being the major product. Furthermore, different sila... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4675742 Sun, 03 Apr 2011 23:00:00 +0100 4675742 http://www.medworm.com/index.php?rid=4675741&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1772 AbstractA mixture of benzimidazole salts (2–7), Pd(OAc)2 and K2CO3 in DMF–H2O catalyzes the Suzuki–Miyaura cross‐coupling reactions promoted by microwave irradiation resulting in high yield within a short time. In particular, the yield of the Suzuki–Miyaura reactions with aryl bromides was found to be nearly quantitative. The synthesized benzimidazole salts (2–7) were identified by 1H‐13C, NMR, IR spectroscopic methods and microanalysis. The molecular structure of 1 was determined by X‐ray crystallography. The antibacterial and antifungal activities of the novel benzimidazole derivatives (1–7) were also tested against standard strains. Copyright © 2011 John Wiley & Sons, Ltd.An efficient catalyst system, containing benzimidazolium salts bearing trimethylsilyl moietie... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4675741 Sun, 03 Apr 2011 23:00:00 +0100 4675741 http://www.medworm.com/index.php?rid=4675740&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1779 AbstractTwo new boron complexes were synthesized from N‐[3‐(methylmercapto)aniline]‐3,5‐di‐tert‐butylsalicylaldimine (LH) with boron reagent BPh3 or BF3.Et2O. These boron complexes are stable and easily soluble in protic solvents such as ethanol (C2H5OH) but hardly soluble in nonprotic solvents such as chloroform (CHCl3), dichloromethane (CH2Cl2) and tetrahydrofuran (THF). All new boron complexes have been fully characterized by both analytical and spectroscopic methods. The catalytic activities of complexes [LBPh2], 2, and [LBF2], 3, in the transfer hydrogenation of acetophenone derivatives were tested. Stable boron complexes were found to be efficient catalysts in the transfer hydrogenation of aromatic ketones in good conversions up to 99% in the presence of iso‐PrOH/KOH. C... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4675740 Thu, 31 Mar 2011 23:00:00 +0100 4675740 http://www.medworm.com/index.php?rid=4651749&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1775 AbstractA new type of ethoxylated double‐tail trisiloxane surfactants containing a propanetrioxy spacer of the general formula ROCH2CH(OR)CH2O(CH2CH2O)xCH3 [R = Me3SiOSiMe(CH2)3OSiMe3, x = 8.4, 12.9, 22] has been synthesized. Their structures were characterized by 1H‐NMR, 13C‐NMR and 29Si‐NMR spectroscopy. The critical micelle concentration (CMC) values of these double‐tail trisiloxane surfactants were at the level of 10−5 mol l−1, and the surface tension values of their aqueous solutions at CMC were in the range of 21‐24.9 mN m−1. Only the double‐tail trisiloxane surfactant with average ethoxy units of 8.4 (1P) possesseda good spreading ability (SA) value. Its SA values of aqueous solutions (5.0 × 10−3 mol l−1) on parafilm and Ficus microcarpa leaf surfaces were m... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4651749 Wed, 30 Mar 2011 02:39:37 +0100 4651749 http://www.medworm.com/index.php?rid=4651750&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1773 AbstractA series of novel quasi‐scorpionate CNC donor ligands, MeC(2‐C5H4N){CH2(imidazole‐R)} (R = methyl, n‐butyl, n‐propenyl), in which a chelating bis(NHC) core is supplemented by a hemi‐labile pyridyl donor, were prepared. The coordination chemistry of these ligands was investigated with silver, palladium, rhodium and iridium. The single crystal X‐ray structures of [Rh(NC2Me)(COD)]Cl 8a and [Ir(NC2Pr)(COD)]Br 9b were determined. The catalytic potential of the rhodium and iridium complexes was assessed in the transfer hydrogenation of ketones; the iridium complexes, which show superior performance, form very effective and stable catalysts. Copyright © 2011 John Wiley & Sons, Ltd.New chelating bis‐N‐heterocyclic carbene ligands have been synthesised; their coordina... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4651750 Mon, 28 Mar 2011 23:00:00 +0100 4651750 http://www.medworm.com/index.php?rid=4641396&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1780 AbstractA reusable CuSO4 · 5H2O/cationic 2,2′‐bipyridyl system catalyzed the homocoupling reaction of terminal alkynes in water using I2 as the additive in the presence or absence of tetrabutylammonium bromide, giving the 1,3‐diynes in good to high yields. After reaction, the residual aqueous solution could be reused several times. Copyright © 2011 John Wiley & Sons, Ltd.A reusable CuSO4·5H2O/cationic 2,2′‐bipyridyl system catalyzed the homocoupling reaction of terminal alkynes in water using I2 as the additive in the presence or absence of TBAB, giving the 1,3‐diynes in good to high yields. After reaction, the residual aqueous solution could be reused several times. (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4641396 Mon, 28 Mar 2011 16:24:56 +0100 4641396 http://www.medworm.com/index.php?rid=4641397&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1771 AbstractA series of organotin(IV) compounds R3Sn(A) where R = Me or Ph and A is a chromogenic nitrophenolate ligand were prepared and studied as possible colorimetric sensors for anions (F−, Cl−, Br−, AcO−, H2PO4−). Equilibrium constants for a complete set of reactions between R3Sn(A) with A = 2‐amino‐4‐nitrophenolate (ANP) or 4‐nitrophenolate and anions (X−) involving formation of complexes R3Sn(A)(X)− and substitution products R3Sn(X) and R3Sn(X)2− were determined by UV‐vis and 1H NMR titrations in MeCN and DMSO. The binding selectivity was AcO− > F− > H2PO4− > Cl− ≫ Br− in both solvents and both for R = Me and Ph with higher affinity for R = Ph. Compounds with A = ANP were found to have the optimum properties as anion sensors allowing optic... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4641397 Fri, 25 Mar 2011 00:00:00 +0100 4641397 http://www.medworm.com/index.php?rid=4559134&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1752 AbstractA series of Fe(III), Co(II) and Cu(II) complexes of 8‐quinolinol were encapsulated into the supercages of zeoliteY and characterized by X‐ray diffraction, SEM, N2 adsorption/desorption, FT‐IR, UV–vis spectroscopy, elemental analysis, ICP‐AES and TG/DSC measurements. The encapsulation was achieved by a flexible ligand method in which the transition metal cations were first ion‐exchanged into zeolite Y and then complexed with 8‐quinolinol ligand. The metal‐exchanged zeolites, metal complexes encapsulated in zeolite–Y plus non‐encapsulated homogeneous counterparts were all screened as catalysts for the aerobic oxidation of styrene under mild conditions. It was found that the encapsulated complexes always showed better activity than their respective non‐encapsu... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4559134 Tue, 01 Mar 2011 00:00:00 +0100 4559134 http://www.medworm.com/index.php?rid=4494304&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1763 AbstractSmNiCl2 as a reductive system promoted reductive coupling of aryl adehydes and aryl ketone into pinacols in good yields and also promoted coupling reaction of aryl sulfonyl chlorides and active halides into sulfones in good yields. Copyright © 2011 John Wiley & Sons, Ltd.SmNiCl2 as a reductive system promoted reductive coupling of aryl adehydes and aryl ketone into pinacols in good yields and also promoted coupling reaction of aryl sulfonyl chlorides and active halides into sulfones in good yields. (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4494304 Fri, 18 Feb 2011 23:51:45 +0100 4494304 http://www.medworm.com/index.php?rid=4488583&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1760 AbstractA monometallic (Cu2+, 1) and a bimetallic (Cu2+Nd3+, 2) Salen‐type Schiff‐base complexes with different reactive species, could efficiently catalyze the bulk solvent‐free melt ring‐opening polymerization (ROP) of L‐lactide. Especially for the bimetallic complex 2, the involvement of rare earth ion was important and influential to the catalytic behaviors. Copyright © 2011 John Wiley & Sons, Ltd.A monometallic (Cu2+, 1) and a bimetallic (Cu2+Nd3+, 2) complex based on the Salen‐type Schiff‐base ligand H2L (H2L = N,N′‐bis(3‐methoxysalicylidene)ethylene‐1,2‐diamine) were synthesized and characterized by FT‐IR, ESI‐MS and X‐ray crystallography. The catalysis results showed that the two complexes with different active species, could efficiently cat... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4488583 Fri, 18 Feb 2011 00:22:23 +0100 4488583 http://www.medworm.com/index.php?rid=4494305&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1761 AbstractCalix[4]arene derivatives containing ferrocene units at the upper rim have been synthesized and their anion‐binding and sensing investigated towards anions such as chloride, bromide and hydrogen sulfate by cyclic voltammetry. Electrochemical studies show that these redox‐active ligands electrochemically recognize chloride and bromide anions. These compounds have excellent selectivity for chloride and bromide ions, in the comparison with hydrogen sulfate anion. With ferrocenyl Schiff base calix[4]arene 1 an anodic shift as large as 302 mV is observed on addition of four equivalents of Cl− anion. Also electrochemical and UV–vis spectroscopic titrations ferrocenyl calix[4]arene derivatives 1 with chloride and bromide ions and 2 (only with Cl−) indicate a 1:1 binding‐stioch... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4494305 Thu, 17 Feb 2011 00:00:00 +0100 4494305 http://www.medworm.com/index.php?rid=4476773&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1769 (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4476773 Tue, 15 Feb 2011 09:19:11 +0100 4476773 http://www.medworm.com/index.php?rid=4454568&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1762 AbstractThe sterically hindered Schiff bases (L3–L5), prepared from 3,5‐dicumenyl salicylaldehyde and chiral amino alcohols, were used in combination with Ti(OiPr)4 for asymmetric oxidation of aryl methyl sulfides with H2O2 as terminal oxidant. Among the ligands L3–L5, L4 with a tert‐butyl group in the chiral carbon of the amino alcohol moiety gave the best result with 89% yield and 73% ee for the sulfoxidation of thioanisole under optimal conditions [with 1 mol% of Ti(OiPr)4 in a molar ratio of 100:1:1.2:120 for sulfide:Ti(OiPr)4:ligand:H2O2 in CH2Cl2 at 0 °C for 3 h]. The reaction afforded good yield (84%) with a moderate enantioselectivity (62% ee) even with a lower catalyst loading from 1.0 to 0.5 mol%. The oxidations of methyl 4‐bromophenyl sulfide and methyl 4‐methoxyphe... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4454568 Wed, 09 Feb 2011 23:34:20 +0100 4454568 http://www.medworm.com/index.php?rid=4454570&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1766 AbstractSquare pyramidal copper(II) complexes with second‐generation fluoroquinolone, pefloxacin and phenanthroline derivatives were prepared and characterized. They were also screened for in–vitro activity against two Gram(+ve) and three Gram(−ve) microorganisms. SOD mimic behavior was actively sought for clinical and mechanistic purposes under a nonenzymatic system (NBT–NADH–PMS), and was found to have good antioxidant activity. The complexes are avid DNA binders having binding constant (Kb) in the power of 4. Viscosity measurement data confirmed that complexes bind through classical intercalative mode of binding. The cleavage ability on pUC19 DNA was determined using gel electrophoresis technique. Copyright © 2011 John Wiley & Sons, Ltd.Binding constant of complexes with ... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4454570 Wed, 09 Feb 2011 00:00:00 +0100 4454570 http://www.medworm.com/index.php?rid=4454569&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1765 AbstractA series of N2,N2′‐disubstituted oxalic acid bishydrazides were synthesized. Some, for example, N2,N2′‐di‐1‐(4‐methoxyphenyl)‐ethanyloxylic‐(bishydrazide), are novel and effective ligands for copper‐catalyzed Ullmann‐type CN coupling reaction in water. A variety of amines could be effectively N‐arylated with aryl halides under both microwave irradiation and conventional heating (even at 30 °C) with good to excellent yields. Copyright © 2011 John Wiley & Sons, Ltd.A series of N2,N2′‐disubstituted oxalic acid bishydrazides were been synthesized and applied to be novel and effective ligands for copper‐catalyzed Ullmann‐ type CN coupling reaction in water. A variety of amines could be effectively N‐arylated with aryl halides under both micr... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4454569 Wed, 09 Feb 2011 00:00:00 +0100 4454569 http://www.medworm.com/index.php?rid=4432531&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1749 AbstractThe transition metal compounds Pd(OAc)2, RhCl3·4H2O and RuCl3 · nH2O were adsorbed onto the nanoporous silica polyamine composite (SPC) particles (150–250 µm), WP‐1 [poly(ethyleneimine) on amorphous silica], BP‐1 [poly(allylamine) on amorphous silica], WP‐2 (WP‐1 modified with chloroacetic acid) and BP‐2 (BP‐1 modified with chloroacetic acid). Inductively coupled plasma‐atomic emission spectrometry analysis of the dried samples after digestion indicated metal loadings of 0.4–1.2 mmol g−1 except for RhCl3·4H2O on BP‐2 which showed a metal loading of only 0.1 mmol g−1. The metal loaded composites were then screened as hydrogenation catalysts for the reduction of 1‐octene, 1‐decene, 1‐hexene and 1, 3‐cyclohexadiene at a hydrogen pressure of 5 atm in... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4432531 Tue, 01 Feb 2011 00:00:00 +0100 4432531 http://www.medworm.com/index.php?rid=4410904&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1767 (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4410904 Fri, 28 Jan 2011 22:28:44 +0100 4410904 http://www.medworm.com/index.php?rid=4404766&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1747 AbstractA new polyethylene glycol‐supported chiral monosulfonamide was synthesized from (R,R)‐1,2‐diaminocyclohexane and shown to act as a ligand for ruthenium(II)‐catalyzed asymmetric transfer hydrogenation of aromatic ketones in neat water using sodium formate as the hydrogen source. Good enantioselectivities were obtained and the catalyst could be easily separated from the reaction mixture and reused several times. Copyright © 2011 John Wiley & Sons, Ltd.A new polyethylene glycol‐supported chiral monosulfonamide was synthesized from (R,R)‐1,2‐ diaminocyclohexane and shown to act as ligand for ruthenium(II) catalyzed asymmetric transfer hydrogenation of aromatic ketones in neat water using sodium formate as the hydrogen source. (Source: Applied Organometallic Chemistry... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4404766 Thu, 27 Jan 2011 22:28:22 +0100 4404766 http://www.medworm.com/index.php?rid=4404768&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1768 (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4404768 Wed, 26 Jan 2011 00:00:00 +0100 4404768 http://www.medworm.com/index.php?rid=4404767&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1764 AbstractZn[(L)proline]2 was used as an efficient catalyst for the one‐pot multicomponent reactions (MCR) of different aromatic amines, aromatic aldehyde and ketones in aqueous media. This method provides a novel and improved method for obtaining stereoselective β‐amino carbonyl compounds in terms of good yield. Little catalyst loading, recyclability, easy accessibility of the catalyst and aqueous media are the main features of this protocol. Moreover column chromatography and recrystallization of product are not required as the crude product itself is very pure. Powder XRD and TEM images of the catalyst were taken for the first time. Copyright © 2011 John Wiley & Sons, Ltd.The Mannich reaction is a valuable coupling protocol for preparing amino carbonyl compounds. Chemistry has m... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4404767 Wed, 26 Jan 2011 00:00:00 +0100 4404767 http://www.medworm.com/index.php?rid=4381870&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1755 AbstractAn in situ‐generated catalytic system based on PdCl2 and primary amine‐based ligand exhibited excellent activity (up to 98% isolated yield) in the Suzuki–Miyaura cross‐coupling reactions of aryl bromides with arylboronic acids in water, at room temperature, without any additive. The efficiencies of the ligands follow the order: (C6H5)3CNH2 > C6H5CH2 NH2 > C6H5 NH2 > C6H11 NH2, which is in accordance with the palladacycle forming capacity of the respective ligands. Moderate‐to‐good yields (up to 78% isolated yield) of the coupling products were also obtained with less reactive aryl chlorides as substrates at room temperature in isopropanol using an alternative protocol based on Pd(OAc)2 and (C6H5)3CNH2. Copyright © 2011 John Wiley & Sons, Ltd.A primary amin... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4381870 Fri, 21 Jan 2011 22:47:19 +0100 4381870 http://www.medworm.com/index.php?rid=4381873&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1758 AbstractFour new diorganotin(IV) complexes of N‐(3,5‐dibromosalicylidene)tryptophane, R2Sn[3,5‐Br2‐2‐OC6H2CHNCH(CH2Ind)COO] [Ind = 3‐indolyl; R = Et (1); n‐Bu (2); Cy (3); Ph (4)], were synthesized and characterized by elemental analysis and IR, NMR (1H, 13C and 119Sn) spectra. The crystal structures of complexes 1–3 were determined by X‐ray single crystal diffraction. The tin atom is five‐coordinated and its coordination geometry is best described as an intermediate between trigonal bipyramidal and square pyramidal. Intermolecular weak interactions in the complexes 1–3 connect molecules into a one‐dimensional helical chain and a two‐dimensional array. The dibutyltin complex 2 has potent in vitro cytotoxic activity against two human tumor cell lines, CoLo205 an... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4381873 Fri, 21 Jan 2011 00:00:00 +0100 4381873 http://www.medworm.com/index.php?rid=4381872&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1753 AbstractHydrogen transfer reduction processes are attracting increasing interest from synthetic chemists in view of their operational simplicity. Reaction of [Ph2PNHCH2‐C4H3S] with [Ru(η6‐benzene)(µ‐Cl)Cl]2, [Rh(µ‐Cl)(cod)]2 and [Ir(η5‐C5Me5)(µ‐Cl)Cl]2 gave a range of new monodendate complexes [Ru(Ph2PNHCH2‐C4H3S)(η6‐benzene)Cl2], 1, [Rh(Ph2PNHCH2‐C4H3S)(cod)Cl], 2, and [Ir(Ph2PNHCH2‐C4H3S)(η5‐C5Me5)Cl2], 3, respectively. All new complexes were fully characterized by analytical and spectroscopic methods. 1H31P NMR, 1H13C HETCOR or 1H1H COSY correlation experiments were used to confirm the spectral assignments. 1–3 are suitable catalyst precursors for the transfer hydrogenation of acetophenone derivatives. Notably [Ru(Ph2PNHCH2‐C4H3S)(η6‐benzene)... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4381872 Fri, 21 Jan 2011 00:00:00 +0100 4381872 http://www.medworm.com/index.php?rid=4381871&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1754 AbstractThe synthesis of an air‐stable series of Pd0 complexes with unsymmetric bidentate N‐pyridine N‐heterocyclic carbene ligands has been described. The carbenes were generated by synthesis of the silver(I) complexes from the imidazolium salts, followed by transmetallation of the C‐N ligands to obtain the target electron‐rich zerovalent palladium compounds. The bidentate coordination behaviour of the ligands was confirmed by 1H, 13C NMR and X‐ray spectroscopy. The complexes are active precatalysts for the selective transfer semihydrogenation of alkynes to Z‐alkenes, with selectivities up to 99%. Copyright © 2011 John Wiley & Sons, Ltd.Air‐stable palladium(0) complexes bearing heterobidentate N‐pyridyl‐NHC ligands were prepared in high yields. These electron‐ri... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4381871 Fri, 21 Jan 2011 00:00:00 +0100 4381871 http://www.medworm.com/index.php?rid=4348932&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1751 AbstractA mixture of novel benzimidazole salts (2a–f), Pd(OAc)2 and K2CO3 in DMFH2O catalyzes, in high yield, the Heck cross‐coupling reaction assisted by microwave irradiation in a short time. All synthesized novel benzimidazole derivatives were characterized by elemental analysis and NMR spectroscopy. In addition, the molecular structure of 2a was determined by X‐ray crystallography. Copyright © 2011 John Wiley & Sons, Ltd.An efficient catalyst system, containing benzimidazolium salts bearing piperidine and morpholine moieties in Heck reaction of aryl halides with phenylboronic acid and styrene under microwave irradiation, is reported. (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4348932 Fri, 14 Jan 2011 23:19:52 +0100 4348932 http://www.medworm.com/index.php?rid=4348934&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1750 AbstractAn efficient and convenient condensation reaction of 2‐aminothiophenol with aldehydes catalyzed by a catalytic amount of ceric ammonium nitrate in polyethylene glycol was investigated. As a result, a set of diverse 2‐substituted benzothiazoles such as 2‐phenylbenzothiazole as well as its p‐Me, p‐NO2, p‐F, p‐Cl, p‐Br, o‐OMe, p‐OMe and 2‐furyl, 2‐pyridyl and styryl derivatives were obtained in good to excellent yields for 5 h at room temperature. Additionally, the catalyst system was recovered and reused several times without evident loss in activity. Copyright © 2011 John Wiley & Sons, Ltd.An efficient and convenient condensation reaction of 2‐aminothiophenol with aldehydes catalyzed by a catalytic amount of ceric ammonium nitrate in polyethylene glyco... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4348934 Fri, 14 Jan 2011 00:00:00 +0100 4348934 http://www.medworm.com/index.php?rid=4348933&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1757 AbstractThe reaction of arylboronic acids with L‐O‐benzoyl‐tartaric acid and D,L‐malic acid has been studied. The obtained (acyloxy)boranes are moderately stable in solution and decompose to give boroxines. 5‐Carboxymethyl‐2‐(4‐methylthiophenyl)‐1,3,2‐dioxaborolan‐4‐one was obtained in the reaction of 4‐methylthiophenylboronic acid with D,L‐malic acid and characterized by X‐ray structural analysis. The use of L‐(−)‐malic acid afforded the optically pure product which can be used as the powerful chiral reagent in the enantioselective reduction of ketones. Copyright © 2011 John Wiley & Sons, Ltd.We have obtained the first crystalline chiral (acyloxy)borane from malic acid and 4‐methylthiophenylboronic acid. This compounds exhibits remarkable reactiv... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4348933 Fri, 14 Jan 2011 00:00:00 +0100 4348933 http://www.medworm.com/index.php?rid=4330151&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1759 AbstractOne‐pot regioselective benzylation of pyrroles and indoles using zirconium tetrachloride is discussed. This has been achieved by in‐situ generation of di(1H‐pyrrol‐1‐yl)zirconium(IV) chloride and di(1H‐indol‐1‐yl)zirconium(IV) chloride. It was observed that benzylation reactions of these complexes using n‐BuLi occurred at C‐2 position for pyrrole and C‐3 for indole. Copyright © 2011 John Wiley & Sons, Ltd.One‐pot regioselective benzylations using zirconium tetrachloride at C‐2 position for pyrroles and C‐3 for indoles are discussed. (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4330151 Tue, 11 Jan 2011 00:38:42 +0100 4330151 http://www.medworm.com/index.php?rid=4330152&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1748 (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4330152 Sun, 09 Jan 2011 00:00:00 +0100 4330152 http://www.medworm.com/index.php?rid=4317731&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1756 AbstractWe have developed a sequential and selective Pd‐catalyzed double‐Heck arylation of ethylene that results in non‐symmetrical nitro‐stilbene analogs of trans‐resveratrol at excellent yields. A catalytic system consisting of Pd(OAc)2 and P(o‐tolyl)3 permitted us to carry out the two consecutive Heck arylations without losing activity from the first to the second Heck reaction. After the first Heck arylation of ethylene, no isolation or additional catalyst loading is required for the second Heck arylation reaction. This protocol was applied to the synthesis of methylated trans‐resveratrol, which was obtained at a 65% overall yield. Copyright © 2011 John Wiley & Sons, Ltd.Synthesis of non‐symmetrical stilbene analogues of trans‐resveratrol using the same Pd cataly... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4317731 Fri, 07 Jan 2011 01:14:21 +0100 4317731 http://www.medworm.com/index.php?rid=4313409&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1742 AbstractSome bis(cyclopentadienyl)titanium(IV) complexes of the type [Cp2TiCl2−n{L}n] {where, n = 1 or 2; L = ONC(R)Ar; R = H or CH3 and Ar = C5H4N‐2, C4H3O‐2 or C4H3S‐2} have been synthesized by the metathetical reactions of Cp2TiCl2 with the sodium salt of internally functionalized oximes in 1:1 and 1:2 stoichiometry in anhydrous THF. All these red to brown colored solid derivatives have been characterized by elemental analyses, FT‐IR and NMR (1H and 13C{1H}) spectral studies. The FAB mass spectra of some representative derivatives indicate their monomeric nature. Oximato ligands in all the complexes appear to bind the titanium via N and O in a dihapto (‐N, O) manner in the solid state. Thermogravimetric curves of [Cp2TiCl{ONC(CH3)C5H4N‐2}] and [Cp2Ti{ONC(CH3)C5H4N‐2}2] s... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4313409 Thu, 06 Jan 2011 01:11:24 +0100 4313409 http://www.medworm.com/index.php?rid=4252457&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1746 Abstract1,3‐Diarylsubstituted imidazolinium salts, (NHC‐H)Cl, 3, containing hydrogen or alkyl groups at the 4,5‐positions of the imidazolidine ring, served as precursors to rhodium(I) complexes [RhCl(NHC)COD], 4, which were converted into cis‐[RhCl(NHC)(CO)2] complexes, 5. All compounds prepared were characterized by elemental analyses, 1H NMR and 13C NMR. The relative σ‐donor/π‐acceptor strength of the NHC ligands was determined by means of IR spectroscopy of 5. The ability of NHCs in 4 to enchance activity was explored in the 1,2‐addition of phenylboronic acid to aldehydes. A good correlation was observed between catalytic activity and the electron‐donating power of the NHC ligands. Copyright © 2010 John Wiley & Sons, Ltd.1,3‐Diarylsubstituted imidazolinium salts... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4252457 Mon, 13 Dec 2010 11:49:44 +0100 4252457 http://www.medworm.com/index.php?rid=4244505&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1734 (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4244505 Thu, 09 Dec 2010 23:53:02 +0100 4244505 http://www.medworm.com/index.php?rid=4240987&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1733 (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4240987 Wed, 08 Dec 2010 00:00:00 +0100 4240987 http://www.medworm.com/index.php?rid=4240986&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1744 AbstractThe scope of the dehydrative allylation reaction using allyl alcohol as allyl donor with [RuCp(PP)]+ complexes as catalysts is explored. Aliphatic alcohols are successfully allylated with allyl alcohol or diallyl ether, obtaining high selectivity for the alkyl allyl ether. The reactivity of aliphatic alcohols is in the order of primary > secondary ≫ tertiary. The tertiary alcohol 1‐adamantanol reacts extremely slowly in the absence of strong acid, but when HOTs is added, reasonable yields of 1‐adamantyl allyl ether are obtained. The alkyl allyl ether is found to be the thermodynamically favored product over diallyl ether. Apart from alcohols, thiols and indole are also efficiently allylated, while aniline acts as a catalyst inhibitor. Allylation reactions with various subs... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4240986 Wed, 08 Dec 2010 00:00:00 +0100 4240986 http://www.medworm.com/index.php?rid=4240985&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1745 AbstractReactions of SnBu3Cl, TiCl4 and NH4OH in ethanol followed by pyrolysis of the resultant product at 550 °C, either in an atmosphere of oxygen or hydrogen, yielding new SnO2TiO2 based composites. In all, eight products were prepared with weight ratios of SnTiO2 of 0% (1), 5% (2), 15% (3) and 30% (4) in O2 and 0% (5), 5% (6), 15% (7) and 30% (8) in H2. XRD revealed diffraction patterns of TiO2 (anatase) in the composites, but not those of SnO2 due to its insufficient crystallinity. Scanning electron microscopy indicated the presence of Sn metal on the surface of composites 6–8. 119Sn Mössbauer experiments revealed SnO2 in all samples, and increasing amounts of tin in samples 7 and 8, respectively. The composites were used in experiments of photocatalytic degradation of indig... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4240985 Wed, 08 Dec 2010 00:00:00 +0100 4240985 http://www.medworm.com/index.php?rid=4240984&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1743 AbstractThe O‐allylation of bisphenol A (BPA) has been performed with the most selective catalysts for O‐allylation of phenols reported previously. Both the cyclopentadienyl–ruthenium catalysts and the palladium–diphosphine catalysts are capable of selectively performing single and double O‐allylation of BPA. An intriguing solvent effect is observed; the choice of the solvent is of key importance for both conversion and selectivity. The use of an excess of diallyl ether as allylating agent results in relatively high yields of the bisallyl ether of bisphenol A, while maintaining the high selectivity for O‐allylation. Copyright © 2010 John Wiley & Sons, Ltd.A new chloride‐free route towards epoxy resins is proposed, for which selective O‐allylation of bisphenol A is cruc... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4240984 Wed, 08 Dec 2010 00:00:00 +0100 4240984 http://www.medworm.com/index.php?rid=4196040&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1739 AbstractA novel multidentate amine grafted on silica gel and magnetic microsphere was prepared. Its chemical structure was confirmed by C13 NMR, XPS and FTIR, and the nitrogen content was determined by elemental analysis. It was also used as a ligand for CuCl and successfully catalyzed the atom transfer radical addition of both carbon tetrachloride (CCl4) to methyl methacrylate and methyl trichloroacetate to styrene, repeatedly. The conversion and purity of the product were determined through gas chromatography and 1H NMR, respectively. The immobilized copper catalyst complex was also used in atom transfer radical polymerization of styrene initiated by 1,1,1,3‐tetrachloro‐3‐phenylpropane and methyl methacrylate initiated by methyl 2‐methyl‐2,4,4,4‐tetrachlorobutyrate, respectiv... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4196040 Wed, 24 Nov 2010 14:16:50 +0100 4196040 http://www.medworm.com/index.php?rid=4158130&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1740 AbstractDespite the fact that sterically demanding 1,2‐dihydrodistannanes are versatile synthons, their synthesis is typically a tedious, low‐yield procedure, which limits synthetic applications. Looking for generally applicable and high‐yield routes, we examined the dehydrogenative coupling of sterically crowded diorganotindihydrides. Herein, we report the application of lanthanide diamide‐based catalysts (CH2)3‐1,3‐[N(Dipp)]2LnBr (Ln = La,Ce,Nd,Dy) to generate polystannanes and distannanes, depending on the size of the aromatic substituents. Reaction of tBu2SnH2 resulted in the quantitative formation of 1,1,2,2‐tetra‐tert‐butyldistannane while conversion of sterically encumbered Mes2SnH2 yielded 1,1,2,2‐tetramesityldistannane. Copyright © 2010 John Wiley & Sons, ... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4158130 Thu, 11 Nov 2010 00:00:00 +0100 4158130 http://www.medworm.com/index.php?rid=4158129&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1728 AbstractA range of monomeric tetra‐coordinate copper (II) and zinc (II) complexes based on N,O‐bidentate salicylaldimine Schiff base ligands has been synthesized and characterized using various spectroscopic techniques. These complexes were then evaluated as initiators in ring‐opening polymerization of lactides at both 70 °C and 110 °C. The effect of structural changes in the complexes on the ability of these compounds to initiate lactide polymerization as well as the impact on the chemical and physical characteristics of the polymers obtained indicate that the coordination geometry of the metal complex, MO bond length and substituents on the Schiff base ligand all play a role in the catalyst activity. Electronic factors were dominant in the case of the copper complexes while st... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4158129 Thu, 11 Nov 2010 00:00:00 +0100 4158129 http://www.medworm.com/index.php?rid=4158128&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1732 AbstractReactions of ethyltrichlorostannane with N,N‐dimethylamides of 2‐(trimethylsilyl)glycolic (2a), 2(S)‐lactic [(S)‐2b] and mandelic (2c) acids led to the first representatives of tin(IV) O,O‐monochelates containing the five‐membered SnOCC(O) monoanionic chelate cycles as a result of the substitution of one halogen atom. According to the X‐ray data, in the case of the derivatives of glycolic and mandelic acids, the isolated complexes have dimeric structures {EtCl2Sn[OCH(R)C(O)NMe2]}2 [R = H (3a), Ph (3c)] with the bridge oxygen atoms and hexacoordinated tin atoms. By contrast, in the case of the derivative of lactic acid (S)‐2b, the product of the reaction is the cationic–anionic complex 2EtCl2Sn[OCH(Me)C(O)NMe2]·HCl (4), which is the adduct of two molecules of the ... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4158128 Thu, 11 Nov 2010 00:00:00 +0100 4158128 http://www.medworm.com/index.php?rid=4149517&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1735 (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4149517 Mon, 08 Nov 2010 00:00:00 +0100 4149517 http://www.medworm.com/index.php?rid=4149516&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1741 AbstractThe 1J(SnC)s in the tin–carbon double‐bond systems were determined for the first time. These results were supported by theoretical calculations, showing the high s‐character of the SnC double bonds. The new findings obtained will be of great use in the development of tin‐containing functionalized materials. Copyright © 2010 John Wiley & Sons, Ltd.The 1J(SnC)s in the tin‐carbon double‐bond systems were determined for the first time. These results were supported by theoretical calculations, showing the high s‐character of the SnC double bonds. The new findings obtained will be of great use in the development of tin‐containing functionalized materials. (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4149516 Mon, 08 Nov 2010 00:00:00 +0100 4149516 http://www.medworm.com/index.php?rid=4149515&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1738 AbstractNew triphenylantimony(V) o‐amidophenolates (AP‐Me,Et)SbPh3 (1) and (AP‐Me,iPr)SbPh3 (2) with unsymmetrically substituted N‐aryl groups and (AP‐Et,Et)SbPh3 (3) with symmetrical N‐aryl group {AP‐R1,R2 is 4,6‐di‐tert‐butyl‐N‐[2‐alkyl(R1),6‐alkyl(R2)‐phenyl]‐o‐amidophenolate dianion} were synthesized and characterized in detail. Complexes were examined for dioxygen activity. The unsymmetrical complexes 1 and 2 were found to form different geometrical isomers (A and B) of spiroendoperoxides [L‐R1,R2(O2)]SbPh3 (4 and 5, respectively) with different dispositions of peroxide group and N‐aryl fragment (methyl and peroxide group are on the same side of the molecule in the less shielded isomer A, and on different sides in the more hindered isomer B). The ... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4149515 Mon, 08 Nov 2010 00:00:00 +0100 4149515 http://www.medworm.com/index.php?rid=4166795&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1736 AbstractAn efficient and recyclable protocol for the Suzuki reaction in water has been developed based on the cloud point of thermoregulated ligand Ph2P(CH2CH2O)nCH3 (n = 22). This method allows the preparation of a variety of biaryls in high yields and the catalytic system can be recycled four times with high efficiency. Copyright © 2010 John Wiley & Sons, Ltd.An efficient and recyclable protocol for the Suzuki reaction in water has been developed based on the cloud point of thermoregulated ligand Ph2P(CH2CH2O)nCH3 (n = 22). The method allows the preparation of a variety of biaryls in high yields and the catalytic system can be recycled four times with high efficiency. (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4166795 Mon, 01 Nov 2010 00:00:00 +0100 4166795 http://www.medworm.com/index.php?rid=4158127&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1737 AbstractThe phosphines L1PPh2 (1) and L2PPh2 (2) containing different Y,C,Y‐chelating ligands, L1 = 2,6‐(tBuOCH2)2C6H3− and L2 = 2,6‐(Me2NCH2)2C6H3−, were treated with PdCl2 and di‐µ‐chloro‐bis[2‐[(N,N‐dimethylamino)methyl]phenyl‐C,N]‐dipalladium(II) and yielded complexes trans‐{[2,6‐(tBuOCH2)2C6H3]PPh2}2PdCl2 (3), {[2,6‐(Me2NCH2)2C6H3]PPh2} PdCl2 (4), {[2,6‐(tBuOCH2)2C6H3]PPh2}Pd(Cl)[2‐(Me2NCH2)C6H4] (5) and {[2,6‐(Me2NCH2)2C6H3]PPh2}Pd(Cl)[2‐(Me2NCH2)C6H4] (6) as the result of different ability of starting phosphines 1 and 2 to complex PdCl2. Compounds 3–6 were characterized by 1H, 13C, 31P NMR spectroscopy and ESI‐MS. The molecular structures of 3,4 and 6 were also determined by X‐ray diffraction analysis. The catalytic activity of complexes ... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4158127 Mon, 01 Nov 2010 00:00:00 +0100 4158127 http://www.medworm.com/index.php?rid=4149514&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1731 AbstractThe reaction of 2‐(2‐bromoethyl)‐1,3‐dioxane with 1‐alkylbenzimidazole derivatives results in the formation of the new benzimidazolium salts (1). The reaction of Pd(OAc)2 with 1,3‐dialkylbenzimidazolium salts (1a–c) yields palladium N‐heterocyclic carbene (NHC) complexes (2a–c). All synthesized compounds were characterized by 1H NMR, 13 C NMR, IR and elemental analysis techniques which support the proposed structures. As catalysts, these new palladium complexes offer a simple and efficient methodology for the synthesis of triarylamines and secondary amines from anilines and amines and in a single step with potassium tertiary butoxide as a base. Copyright © 2010 John Wiley & Sons, Ltd.A convenient method for amination reaction is presented by functional PdN... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4149514 Mon, 01 Nov 2010 00:00:00 +0100 4149514 http://www.medworm.com/index.php?rid=4132086&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1730 AbstractA new ligand, 5‐{[5‐(pyridine‐4‐yl)‐1,3,4‐oxadiazole‐2‐ylthio]methyl}quinoline‐8‐ol (K), was synthesized by base‐catalysed reaction of 5‐chloromethyl‐8‐hydroxy quinoline (CMQ) and 5‐(pyridine‐4‐yl)‐1,3,4‐oxadiazole‐2‐thiol. The obtained ligand K was characterized by 1H NMR, 13C NMR and IR spectroscopic techniques and reacted with transition metal salts to afford metal‐containing heterochelates. The structures of the synthesized heterochelates were characterized using elemental analyses, infrared spectra, electronic spectra, magnetic measurements, FAB mass spectrum and thermogravimetric analyses. The kinetic parameters such as order of reaction (n) and the energy of activation (Ea) are reported using the Freeman–Carroll method. The pre�... Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4132086 Mon, 01 Nov 2010 00:00:00 +0100 4132086 http://www.medworm.com/index.php?rid=4116600&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1729 Abstract (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4116600 Sat, 30 Oct 2010 00:16:41 +0100 4116600 http://www.medworm.com/index.php?rid=4085411&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1726 Abstract (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4085411 Thu, 30 Sep 2010 23:00:00 +0100 4085411 http://www.medworm.com/index.php?rid=4072674&cid=s_37710_59_f&fid=37710&url=http%3A%2F%2Fdx.doi.org%2F10.1002%252Faoc.1723 Abstract (Source: Applied Organometallic Chemistry) Applied Organometallic Chemistry journals http://www.medworm.com/rss/comments.php?id=4072674 Thu, 30 Sep 2010 23:00:00 +0100 4072674