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Title: Kinetics of potassium bromate oxidation of cobalt(III)-bound and unbound ɑ-hydroxy acids
Authors: Sankaran, K R
Srinivasan, Vangalur S
Issue Date: Dec-1989
Publisher: NISCAIR-CSIR, India
Abstract: Potassium bromate {Br(V)}oxidation of pentaammnine-cobalt( III)-bound and unbound mandelic and lactic acids has been studied in 0.20 mol dm-3 HClO4 in 70% aq acetic acid in the presence of 0.010 mol dm–3 Hg(OAc)2. The reactions exhibit total second order kinetics - first order in each reactant. As both Co(III)-bound and unbound ɑ-hydroxy acids get oxidised at comparable rates, ligation of carboxylic acid to cobalt(III) centre does not exert any electrostatic influence on the seat of attack, possibly the ɑ-C-H bond. A suitable mechanism involving formation of a radical intermediate in a slow step from the bromate ester is suggested.
Page(s): 1093-1095
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.28A(12) [December 1989]

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