Abstract
The core structure (μ-SCH 2) 2NH[Fe 2(CO) 6] ( 5) of Fe-only hydrogenases active site model has been synthesized by the condensation of iron carbonyl sulfides, formaldehyde and silyl protected amine. Its monosubstituted complexes (μ-SCH 2) 2NH[Fe 2(CO) 5PR 3] (R = Ph ( 6), Me ( 7)) were accordingly prepared. The coordination configurations of 5 and 6 were characterized by X-ray crystallography. Protonation of complex 7 to form the N-protonated product occurs in an acetonitrile solution upon addition of triflic acid. The redox properties of these model complexes were studied by cyclic voltammetry.
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