[MO(CO)2('BUS'2)2] AND [MOCO(PPH3)('BUS'2)2] - CO COORDINATION AT [MO-S] CENTERS WHERE MO IS IN A HIGH OXIDATION-STATE

In an unusual redox elimination, the complex [Mo(CO)2(('bu)S2')2] (1, ('bu)S2'(2-) = 3,5-di-tert-butyl-1,2-benzenedithiolate(2-)) is formed. For the first time CO has been coordinated to a high-valent [MoS] center, thereby forming a complex that can be regarded as a model for Fe/Mo nitrogenases. The structure of the analogous carbonyltriphenylphosphane complex has been determined by X-ray crystallography.