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Oxidation of Cobalt (III) Complexes of -Hydroxy Acids by Potassium Bromated in the Presence of Surfactant

N. Prabu and Mansur Ahmed

An induced electron transfer reaction has been attempted presently with potassium bromate and pentaammine cobalt (III) complexes of α-hydroxy acids in the presence of micelles. The reaction exhibits second order kinetics and in the case of mandelato complexes the amount of cobalt (III) reduced corresponds to nearly 70% of mandelato complex is converted to keto acid cobalt (III) complex. In potassium bromate induced electron transfer in the complex, the intermediate radical formed dissociates in a nearly synchronous manner with C-C bond cleavage and the rest of it proceeding with α-C-H fission yielding keto acid cobalt (III) complex. With increasing the detergent concentration, an increase in the rate is observed.