Using pendant ferrocenyl group(s) as an intramolecular standard to probe the reduction of diiron hexacarbonyl model complexes for the sub-unit of [FeFe]-hydrogenase |
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Authors: | Xianghua Zeng Zhimei Li Zhiyin Xiao Yanwei Wang Xiaoming Liu |
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Institution: | 1. Department of Chemistry, Nanchang University, Nanchang 330031, China;2. Institute for Advanced Study, Nanchang University, Nanchang 330031, China |
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Abstract: | The synthesis and characterisation of two diiron hexacarbonyl complexes Fe2(SXS)(CO)6], 1 (SXS = ((?SCH2)2C(CH3)CH2OCOFc, Fc = ferrocenyl group) and 2 (SXS = (?SCH2CH2NHCOFc)2), were described. By using intramolecularly integrated ferrocenyl group(s) in the complexes as an internal standard, the nature of two stepwise one-electron processes of the complexes coupled with a chemical reaction was clearly demonstrated. Examining how the reduction transformed into sole one-electron process with both increasing scanning rate under Ar/CO atmosphere and lowering temperature indicated conclusively that the reduction of both complexes couples to a chemical reaction which involves CO-loss. |
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