Fe–S complexes containing five-membered heterocycles: novel models for the active site of hydrogenases with unusual low reduction potential†‡
Abstract
Three biomimetic 2Fe2S complexes [{(µ-SCH2)2NCH2(2-C4H3O)}](Fe2(CO)6) (6a), [{(µ-SCH2)2 NCH2(2-C4H3S)}](Fe2(CO)6) (6b) and [{(µ-SCH2)2NCH2(5-Br-2-C4H2S)}Fe2(CO)6] (6c) were prepared as models for the active site of Fe-only hydrogenase by the convergent process from [(µ-S2)Fe2(CO)6] and N,N-bis(hydromethyl)-2-furan and