Synthesis, structure and electrochemistry of acetylide-bridged mixed metal cluster [Fe 2(CO) 6(μ 3-S) 2W{(η 5-C 5H 5)W(CO) 3(CCPh)} 2

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Abstract Thermolysis of a toluene solution containing [Fe2W(CO)10(μ3-S)2] (1) and [(η5-C5H5)W(CO)3(CCPh)] (2), at 80°C yields the mixed metal cluster [Fe2(CO)6(μ3-S)2W{(η5-C5H5)W(CO)3(CCPh)}2] (3). 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. Two separate molecules of [(η5-C5H5)W(CO)3(CCPh)] are attached to the W atom of the Fe2W core through the acetylide groups.