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Öğe Crystal structure of dichlorido(N-(biphenyl-2-ylmethyl)-N-(2-ethoxy-ethyl)]-imidazolidin-2-ylidene(?6-hexamethylbenzene)ruthenium, Ru(C12H18)(C20H24N2O)Cl2(R Oldenbourg Verlag, 2004) Arslan, H; Vanderveer, D; Özdemir, I; Cetinkaya, B; Yasar, SC32H42Cl2N2ORu, monoclinic, P12(1)/cl (no. 14), a = 12.930(4) Angstrom, b = 18.094(6) Angstrom, c = 13.655(4) Angstrom, beta = 114.00(2)degrees, V = 2918.4 Angstrom(3), Z = 4, R-gt(F) = 0.046, wR(ref)(F-2) = 0.133, T = 193 K.Öğe Dichloro[3-(1-naphthylmethyl)-1-(2,4,6-trimethylbenzyl)imidazolidin-2-ylidene]ruthenium(Blackwell Publishing, 2005) Arslan, H; VanDerveer, D; Özdemir, I; Yasar, S; Çetinkaya, BIn the title compound, [RuCl2(C24H26N2)], the multidentate ligand functions as both an arene and a carbene, and occupies four coordination sites. The two Cl atoms complete a distorted octahedron about the Ru atom.Öğe In-situ generated functionalized benzimidazol-2-ylidene-palladium catalyst for Suzuki reaction(Polish Chemical Soc, 2004) Özdemir, I; Gök, Y; Gürbüz, N; Yasar, S; Çetinkaya, E; Çetinkaya, BFrom readily available starting materials functionalized 1,3-dialkylbenzimidazolium salts (la-g) have been prepared and characterized by conventional spectroscopic methods and elemental analysis. The in situ prepared three component system Pd(OAC)(2)/1,3-dialkylbenzimidazolium halides (1a-g) and Cs2CO3 catalyses Suzuki cross-coupling of aryl chloride substrates. These concepts for making catalysts in situ open the way for the discovery of many new catalysts via the interaction of commercially available metal complexes and suitable electron releasing ligands.Öğe Palladium-catalysed Suzuki reaction of aryl chlorides in aqueous media using 1,3-dialkylimidazolidin-2-ylidene ligands(Wiley-Blackwell, 2005) Özdemir, I; Demir, S; Yasar, S; Çetinkaya, BA highly effective, easy to handle and environmentally benign process for palladium-mediated Suzuki cross-coupling is developed. The in situ prepared three-component system Pd(OAC)(2)-1,3bis(alkyl)imidazolinium chlorides (2a-f) and CS2CO3 catalyses quantitatively the Suzuki crosscoupling of deactivated aryl chlorides. Copyright (C) 2004 John Wiley Sons, Ltd.Öğe Ruthenium(II) N-heterocyclic carbene complexes in the transfer hydrogenation of ketones(Springer, 2005) Özdemir, I; Yasar, S; Çetinkaya, BSix ruthenium-N-heterocyclic carbene complexes (2-7) have been prepared and the new compounds characterized by C, H, N analyses, H-1-n.m.r. and C-13-n.m.r. The reduction of ketones to alcohols via transfer hydrogenation was achieved with catalytic amounts of complexes (2-7) in the presence of t-BuOK.Öğe Suzuki reaction of aryl chlorides using saturated N-heterocarbene ligands(John Wiley & Sons Inc, 2005) Özdemir, I; Yasar, S; Demir, S; Çetinkaya, BFrom readily available starting materials, six 1,3-dialkly-imidazolinium bromides (2a-f) have been prepared and characterized by conventional spectroscopic methods and elemental analyses. The incorporation of saturated N-heterocyclic carbenes into palladium precatalysts gives high catalyst activity in the Suzuki coupling of deactivated aryl chloride substrates in aqueous media. The complexes were generated in the presence of Pd(OAC)(2) by in situ deprotonation of 2a-f. (c) 2005 Wiley Periodicals, Inc.
