文摘
The strikingly different reactivity of a series of homo- and heterodinuclear [(MIII)(μ-O)2(MIII)′]2+ (M=Ni; M′=Fe, Co, Ni and M=M′=Co) complexes with β-diketiminate ligands in electrophilic and nucleophilic oxidation reactions is reported, and can be correlated to the spectroscopic features of the [(MIII)(μ-O)2(MIII)′]2+ core. In particular, the unprecedented nucleophilic reactivity of the symmetric [NiIII(μ-O)2NiIII]2+ complex and the decay of the asymmetric [NiIII(μ-O)2CoIII]2+ core through aromatic hydroxylation reactions represent a new domain for high-valent bis(μ-oxido)dimetal reactivity.