Photochemical Generation of μ-Amido-μ-peroxo-bis[bis(ethylenediamine)cobalt(III)] Complex from the Corresponding μ-Hyperoxo Complex in Neutral Aqueous Solution

Abstract
A μ-amido-μ-hyperoxo complex, [(en)2Co(NH2,O2−)Co(en)2]4+, was found to generate the corresponding μ-peroxo complex, together with mononuclear cobalt(III) complexes upon irradiation with near-ultraviolet light in a neutral aqueous solution. The result is different from that obtained in an acidic aqueous solution, in which the products are [Co(NH3)(en)2(H2O)]3+ and Coaq2+. The photochemical reaction mechanisms are discussed.