Abstract

K. Anbarasu^1* and P. Selvi²

The kinetics of oxidations of α-hydroxy acids such as glycolic acid, lactic acid and mandelic acids with piperidiniumchlorochromate has been studied in aqueous acetic acid medium. The reaction order is one with respect to oxidant, substrate and fractional order with respect to hydrogen ion concentration. Decrease in dielectric constant of the medium increases the rate of reaction. No appreciable change in the rate is observed by increasing the ionic strength of the medium. The reaction does not induce the polymerization of acrylonitrile. From the kinetic data obtained, the activation parameters have been calculated and plausible mechanism has been proposed. The relative reactivity of the order is α-hydroxy acids viz., glycolic acid < lactic acid

Kinetics; Oxidation; Parameters; Piperidiniumchlorochromate

[ View HTML Full Text]