A bis(sulfenato-S)Co III complex and its corresponding bis(sulfinato-S) complex were prepared. Their catalytic nitrile hydration activity was tested. Whereas the former cata-
Postcoordination oxidation by dioxygen of one of the thiolate groups in a pentadentate N(2)S(3) ligand results in an iron(III) complex with two N-carboxamido, two thiolato, and one O-sulfinato ligands (see the CAMERON representation). This novel mixed coordination is similar to that determined for the inactive form of the nitrile hydratase from Rhodococcus sp. N-771, but differs by the O versus S binding of the sulfinato ligand.
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