Synthesis, Structure, and Electrochemistry of [(η<sup>5</sup>-C<sub>5</sub>H<sub>5</sub>)<sub>2</sub>Mo<sub>2</sub>WFe<sub>2</sub>(O)<sub>2</sub>(S)<sub>2</sub>(CO)<sub>9</sub>(CCPh)<sub>2</sub>]
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Thermolysis of a toluene solution containing [Fe2W(CO)10(μ3-S)2] (1) and [(η5-C5H5)Mo(CO)3(CCPh)] (2) in the presence of air at 70 °C yields the mixed-metal cluster [(η5-C5H5)2Mo2WFe2(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 sulfido ligand. Each Fe atom bears three carbonyl groups, while the W atom is attached to two different Mo-containing moieties. It is π-bonded to the C⋮C bond of a (η5-C5H5)Mo(CO)3(C⋮CPh) unit, and it is also bonded to a second Mo atom, and this bond is bridged by an oxo group and a μ2,η2-CCPh group. Also attached to this Mo atom is a terminal oxo group. Compound 3 has been investigated electrochemically.
