Formation and structures of novel polynuclear complexes containing Mo–Mo or Mo–Co bonds with bridging SR or PR2 group

Four dimolybdenum complexes with bridging thiolato groups, (η5-C5H5)(CO)Mo(μ-SR)3Mo(CO)3 (4; R=Me, Ph, Bn (benzyl), Tol), were formed from Mo(CO)3(NCMe)3 and [C5H4SR]−. The related complex (η5-C5H5)(CO)Mo(μ-SR)3Mo(CO)(SR)2 (5; R=Ph) was obtained when additional [C5H4SR]− was used in the reaction. The molecular structures of 4 (R=Bn) and 5 were determined by X-ray crystallography. A Mo2Co complex (6) was obtained from (η5-C5H4−Li+)(CO)3MoCo(CO)4 and Ph2PCl. The structure, determined from X-ray diffraction data, reveals some unusual bridging arrangements.