Conversion of a µ3-alkylidyne into a µ3-acyl group at a trimetal centre; X-ray crystal structures of the phosphide bridged complexes [Fe2W(µ3-OCCH2R)(µ-PPh2)2(CO)5(η-C5H5)] and [Fe2W(µ-OCCH2R)(µ-PPh2)2(CO)6(PPh2H)(η-C5H5)](R = C6H4Me-4)

Abstract

Treatment of compound [Fe₂W(µ³-CR)(µ-CO)(CO)₈(η-C₅H₅)] with PPh₂H afford the phosphido-bridged acyl complexes [Fe₂W(µ₃-OCCH₂R)(µ-PPh₂)₂(CO)₅(η-C₅H₅)] and [Fe₂W(µ-OCCH₂R)(µ-PPh₂)₂(CO)₆(PPh₂H)(η-C₅H₅)], as well as the compound [Fe₂W(µ₃-CR)(µ-PPh₂)₂(CO)₆(η-C₅H₅)](R = C₆H₄Me-4); the structures of the acyl species have been established by X-ray crystallography.