Reactions of 2-pyridinethiolate cobalt(III) complexes with pyridinethiolate or benzenethiolate ligands
摘要:
Four half- sandwich cobalt complexes, Cp* Co( 2- PyS) 2 ( 2), Cp* Co( 2- PyS) 2 HI ( 3), Cp* Co( 2- PyS) ( 4- PyS) ( 4), ( Cp* Co) 2( l- PhS) 2( l- 2- PyS) I ( 5) [ Cp* = pentamethylcyclopentadienyl, 2- PyS = 2- pyridinethiolate, 4- PyS = 4- pyridinethiolate, PhS = benzenethiolate] were successfully synthesized by the reactions of 2- pyridinethione, lithium 4- pyridinethiolate and lithium benzenethiolate with Cp* Co( 2- PyS) I ( 1), respectively. Complexes 2 and 3 have the structures with two 2- pyridinethiolates ligands coordinated to the cobalt atom. Two different pyridinethiolates ligands can be identi. ed in complex 4. The molecular structure of 5 consists of two Cp* - Co fragments, which are triply bridged by three sulfur atoms from different ligands. The molecular structures of 3 and 5 were determined by X- ray crystallographic analysis. All the complexes have been well characterized by elemental analysis, NMR and IR spectra. (c) 2008 Elsevier B. V. All rights reserved.