Synthesis, structure, and electrochemistry of [(eta(5)-C5H5)(2)Mo2WFe2(O)(2)(S)(2)(CO)(9)(CCPh)(2)]

Abstract

Thermolysis of a toluene solution, containing [Fe2W(CO)(10)(mu (3)-S)(2)] (1) and [(eta (5)-C5H5)Mo(CO)(3)(CCPh)] (2) in the presence of air at 70 degreesC yields the mixed-metal cluster [(eta (5)-C5H5)(2)Mo2WFe2(O)(2)(S)(2)(CO)(9)(CCPh)(2)] (3). The structure of 3 has been established crystallographically. It consists of a triangular Fe2W unit, each face of which is capped by a sulfide ligand. Each Fe atom bears three carbonyl groups, while the W atom is attached to two different Mo-containing moieties.;lt is ct-bonded to the C equivalent toC bond of a (eta (5)-C5H5)Mo(CO)(3)(C equivalent to CPH) unit, and it is also bonded to a second Mo atom, and this bond is bridged by an mo group and a mu (2),eta (2)-CCPh group. Also attached to this Mo atom is a terminal oxo group. Compound 3 has been investigated electrochemically.