Dinuclear Iron Isonitrile Complexes: Models for the Iron Hydrogenase Active Site
- 14 June 2003
- journal article
- Published by American Chemical Society (ACS) in Inorganic Chemistry
- Vol. 42 (14) , 4288-4292
- https://doi.org/10.1021/ic034334b
Abstract
Reaction of Fe2(μ-S2C3H6)(CO)6 (1) with 2 equiv of t-BuNC affords a disubstitued species Fe2(μ-S2C3H6)(CN-t-Bu)2(CO)4 (2). The structure of 2 has been determined by X-ray crystallography, which shows that in the solid state both isonitrile ligands are cis to sulfur. In solution, NMR and IR spectroscopy suggest that multiple isomers are present. Protonation of 2 occurs at the Fe−Fe bond to give a cationic complex 3 as four different isomeric species. Complex 3 does not react with deuterium gas (98 psi) in the absence of light. Irradiation of solutions of 3 with visible light under D2 gas leads to formation of HD.Keywords
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