Metal-ligand multiple bonds. Oxo, imido and nitrido complexes of ruthenium and osmium

摘要

Ru=O complexes have been demonstrated to be competent oxidants for oxidation of saturated hydrocarbons and epoxidation of alkenes . Photoexcitation of transdioxoosmium( V1) gives rise to super-oxidizing complexes having EO >2.2 V vs. n.h.e.. Some cationic RuZN and OsZN complexes are good model system for study of the mechanism of metalcatalysed oxidation of ammonia to nitrite and activation of diiiitrogen molecule. With 2,3-diamino-2,3-dimethylbutane as ligand, reversible Os(1V)-amide/Os(III)-amine and Ru(V)- imido/Ru(II)-amine redox couplexes are observed.