Heterodinuclear Complexes Containing S2CPR3 as Asymmetric Bridges between Cobalt and Metals of Group 7 (Manganese, Rhenium) or Group 6 (Molybdenum, Tungsten): Selective Cobalt-Carbon Bond Formation. X-ray Structures of [MnCo(CO)5(.mu.-S2CPCy3)] and [MoCo(.eta.3-C3H5)(CO)4(.mu.-S2CPCy3)].cntdot.CH2Cl2
