Condensation of the triosmium acetonitrile complex Os3(CO)~ù(NCMe) e with the sulfido complex CpW(CO)3(CHeSMe ) in refluxing THF solution produced three sulfur-containing compounds Os3(2) and CpWOs3(CO)I_~(II-CH~_)(t*-SMe) (3). Clusters 2 and 3 were products involving a 1:1 combination of starting materials and were characterized by X-ray diffraction studies. Crystals of 2 belongs to monoclinic space group P 2z/« with a=8.418(2), b=11.912(2),