Synthesis, characterization, and reactions of iron-sulfur clusters containing the S2 ligand: [Cp2Fe2(S2)(SR)2]0,1+, [Cp4Fe4S5]0,1+,2+, and [Cp4Fe4S6]

Article abstract of DOI:10.1021/ic50222a056

Syntheses of the following disulfide-containing dinuclear and tetranuclear organoiron compounds are described: [Cp₂Fe₂(S₂)(SR)₂]^0,1+, [Cp₄Fe₄S₅]^0,1+,2+, and [Cp₄Fe₄S₆] (Cp = η⁵-C₅H₅). The compounds have been characterized by spectroscopic, electrochemical, and chemical properties. Temperature-dependent ¹H NMR spectroscopy indicates fluxionality of the triply bridging disulfide ligand in Cp₄Fe₄S₅ⁿ (n = 0 and 2+). The cluster products resulting when these disulfide-containing complexes are chemically or electrochemically oxidized, including [CpFe(SR)(NCMe)]₂²⁺, and adducts formed with other metals via the electron-rich disulfide ligands are discussed.