Synthesis, characterisation and electrochemistry of the novel ferrocenyl-dienediyltriosmium cluster [Os3(CO)9{µ3-η4-Fe[C5H4(C2SiMe3)]2}]

Abstract

The reaction between [Os₃(CO)₁₀(MeCN)₂] and [Fe{C₅H₄(C₂SiMe₃)}₂] yielded [Os₃(CO)₁₀{µ₃-η²-Fe[C₅H₄(C₂SiMe₃)]₂}]1 and the decarbonylated product of this complex, [Os₃(CO)₉{µ₃-η⁴-Fe[C₅H₄(C₂SiMe₃)]₂}]2, the structure of which has been shown by X-ray crystallography to incorporate a triosmium cluster linked via a metallobutadienyl ligand to a ferrocene unit; the cyclic voltammogram of 2 shows a reversible one-electron oxidation of the ferrocene unit and an irreversible two-electron reduction for the triosmium unit.