Benzoate-functionalized diiron propanedithiolate complexes with mono- and di-phosphine ligands as catalysts for reduction of protons
作者： Chang-Gong Li , Feng Xue , Mao-Jin Cui , Jing-Yan Shang
DOI: 10.1080/00958972.2015.1026812
关键词:
摘要: Reaction of the diiron propanedithiolate complex [μ-(SCH2)2CHO2CC6H5]Fe2(CO)6 (A) with triphenylphosphine (PPh3) or cis-1,2-bis(diphenylphosphine)ethylene (cis-dppv) in presence one equivalent Me3NO·2H2O yielded a mono-substituted [μ-(SCH2)2CHO2CC6H5]Fe2(CO)5(PPh3) (1) an asymmetrically substituted [(μ-SCH2)2CHO2CC6H5]Fe2(CO)4(κ2-dppv) (2), respectively. The structures both complexes were characterized by spectroscopic methods and X-ray crystallography. In solid state, PPh3 ligand 1 occupies apical position square pyramidal geometries Fe2, while cis-dppv 2 coordinates Fe2 apical-basal manner. electrochemistry was investigated. electron-withdrawing benzoate functionality on bridgehead carbon bridge shifts oxidation reduction potentials slightly. Both can catalyze protons from CF3COOH but higher efficiency for 2.
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