Arene ruthenium(II) p-chloroacetophenone phenylthiosemicarbazone complex mediated transfer hydrogenation of ketones
摘要:
A series of cationic half-sandwich arene ruthenium(II) complexes of general formula [Ru(eta(6)-p-cymene)Cl (L)]Cl have been synthesized from the reaction of [Ru(eta(6)-p-cymene)Cl-2](2) with thiosemicarbazone derivatives (L). Characterization of the complexes were accomplished by analytical and spectral (FT-IR, UV-Vis, H-1 NMR) methods. Single crystal structure determination reveals the presence of a pseudooctahedral three-legged piano stool conformation. All the complexes exhibit a quasi-reversible one electron reduction in the range from -0.75 to -0.85 V. Further, the catalytic activity of the titled complex has been investigated in the transfer hydrogenation of ketones in the presence of isopropanol/NaOH. (C) 2010 Elsevier B.V. All rights reserved.