Novel Single and Double Diiron Oxadithiolates as Models for the Active Site of [Fe]-Only Hydrogenases

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Abstract

The series of diiron oxadithiolate model complexes for the active site of [Fe]-only hydrogenases Fe2(μ-SCH2OCH2S-μ)(CO)6 (1), [Fe2(μ-SCH2OCH2S-μ)(CN)2(CO)4](Et4N)2 (2), [Fe2(μ-SCH2OCH2S-μ)(CN)(CO)5](Et4N) (3), Fe2(μ-SCH2OCH2S-μ)(CO)5[CpFe(CO)2(SPh)] (4), and [Fe2(μ-SCH2OCH2S-μ) (CO)5]2 [(η5-Ph2PC5H4)2 Fe] (5) have been synthesized and fully characterized by elemental analysis, spectroscopy, and X-ray diffraction analysis. The structural features for some of the model complexes are compared with the corresponding features for the active site of [Fe]-only hydrogenases.

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