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Influence of Tertiary Phosphanes on the Coordination Configurations and Electrochemical Properties of Iron Hydrogenase Model Complexes: Crystal Structures of [(μ‐S 2 C 3 H 6 )Fe 2 (CO) 6– n L n ] (L = PMe 2 Ph, n = 1, 2; PPh 3 , P(OEt) 3 , n = 1)
Author(s) -
Li Ping,
Wang Mei,
He Chengjiang,
Li Guanghua,
Liu Xiaoyang,
Chen Changneng,
Åkermark Björn,
Sun Licheng
Publication year - 2005
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200400947
Subject(s) - chemistry , hydrogenase , electrochemistry , cyclic voltammetry , crystallography , redox , crystal structure , coordination complex , stereochemistry , transition metal , inorganic chemistry , metal , catalysis , organic chemistry , electrode
A series of mono‐ and disubstituted diiron complexes [(μ‐pdt)Fe 2 (CO) 5 L] [pdt = 1,3‐propanedithiolato; L = PMe 3 ( 2 ), PMe 2 Ph ( 3 PPh 3 ( 4 ), P(OEt) 3 ( 5 )] and [(μ‐pdt)Fe 2 (CO) 4 L 2 ] [L = PMe 2 Ph ( 6 ), PPh 3 ( 7 ), P(OEt) 3 ( 8 )] were prepared as Fe‐only hydrogenase‐active‐site models by controllable CO displacement of [(μ‐pdt)Fe 2 (CO) 6 ] by tertiary phosphanes. The coordination configurations of 3 – 6 were characterized by X‐ray crystallography. Disubstituted diiron complex 6 features an apical/apical coordination mode, instead of the typical transoid basal/basal configuration. The electrochemistry of 2 – 6 and 8 was studied by cyclic voltammetry to evaluate the effects of different tertiary phosphane ligands on the redox properties of the iron atoms of model complexes. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)