Probing the generation, reactivity, and kinetics of high-valent manganese-oxo phthalocyanines: Insights into oxidation mechanisms.

In this study, manganese(IV)-oxo phthalocyanines [Mn(Pc)(O)] (3) (Pc = phthalocyanine) were produced either through visible light photolysis of [Mn(Pc)(ClO)] or by chemical oxidation of [Mn(Pc)Cl] (1) with iodobenzene diacetate. The manganese(IV)-oxo species under study include tetra-tert-butylphthalocyaine‑manganese(IV)-oxo (3a) and phthalocyanine‑manganese(IV)-oxo (3b). As anticipated, the generated 3 reacted with various organic substrates to yield the oxidized products and further proved to be a competent oxidant via an HO isotope labeling experiment.