Studies on transition-metal nitrido and oxo complexes. Part 14. Carboxylato oxo-osmium(VI) and -ruthenium(VI) complexes and their reactions
Abstract
The new complexes [OsO2(OCOR)Cl2]–[R = Me, Et or CH(Me)Et] and [RuO2(OCOR)Cl2]–(R = Me, Et, Pr or CHF2) have been prepared. In addition to functioning as catalytic oxidants for organic substrates in the presence of N-methylmorpholine N-oxide as co-oxidant, the acetato complexes [MO2(OCOMe)Cl2]– in particular can be used as precursors for a wide variety of complexes. New species prepared from these include [OsO2(NCO)4]2–, [OsO2(SCN)4]2–, [OsO2(acac)Cl2]–(acac = pentane-2,4-dionate), [Os(terpy)Cl3]+(terpy = 2,2′ : 6′,2″-terpyridine), [OsO2(S2CNEt2)2] and [Ru(OH)(H2O)(O2COCR1R2)Cl2](R1= R2= Me or Et; R1= Me, R2= Et or Ph).