Synthesis, structure and electrochemistry of acetylide-bridged mixed metal cluster [Fe2(CO)6(μ3-S)2W{(η5-C5H5)W(CO)3(CCPh)}2]

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.