Preparation, Structure and Electrochemical Property of a Pyrazole-substituted Diiron Dithiolate Complex |
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| Authors: | FENG Ya-Nan CHEN Rui-Ping LI Zhi-Hua DU Shao-Wu |
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| Institution: | 1. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on theStructure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China Graduate School of Chinese Academy qf Sciences, Beijing 100039, China
2. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on theStructure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China |
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| Abstract: | A pyrazole-substituted diiron dithiolate complex Fe2(μ-pdt)(CO)5(3,5-Me2Pz)](1,3,5-Me 2Pz=3,5-dimethylpyrazole) was prepared as a biomimetic model for the active site of FeFe]-hydrogenase by CO-substitution of all-carbonyl complex Fe2(μ-pdt)(CO)6] with 3,5-Me2Pz. The molecular structure was confirmed by MS, IR, 1H NMR, elemental analysis and single-crystal X-ray analysis. Complex 1 crystallizes in the triclinic system, space group P1 with a=9.108(7), b=9.743(8), c=11.192(9), α=109.235(5), β=101.914(9), γ=96.605(6)o. In CH3CN solution, reversible transformation between 1 and the acetonitrile-substituted species Fe2(μ-pdt)-(CO)5(NCCH3)] was detected by both IR and cyclic voltammetry (CV). The electrochemical proton reduction catalyzed by 1 in the presence of acetic acid was also studied in CH2Cl2. |
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| Keywords: | bioinorganic chemistry [FeFe]-hydrogenase substitution proton reduction |
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