Synthesis, structure and electrochemistry of acetylide-bridged mixed metal cluster [Fe<SUB>2</SUB>(CO)<SUB>6</SUB>(&#956;<SUB>3</SUB>-S)<SUB>2</SUB>W{(&#951;<SUP>5</SUP>-C<SUB>5</SUB>H<SUB>5</SUB>)W(CO)<SUB>3</SUB>(CCPh)}<SUB>2</SUB>]

Thermolysis of a toluene solution containing [Fe2W(CO)10(&#956;3-S)2] (1) and [(&#951;5-C5H5)W(CO)3(CCPh)] (2), at 80&#176;C yields the mixed metal cluster [Fe2(CO)6(&#956;3-S)2W{(&#951;5-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 [(&#951;5-C5H5)W(CO)3(CCPh)] are attached to the W atom of the Fe2W core through the acetylide groups