Oxidative Transformation of Lactic acid by  pyridiniumdichromate in nonaqueous mediumKinetic and Mechanistic Study

Rakesh Kumar Sharma; B. K. Dangarh

Volume : V, Issue : VIII, August - 2016

Oxidative Transformation of Lactic acid by pyridiniumdichromate in nonaqueous mediumKinetic and Mechanistic Study

Rakesh Kumar Sharma, B. K. Dangarh

Abstract :

 The alpha–hydroxy acids (AHA) are naturally occurring organic acids.The oxidation of lactic acid by pyridiniumdichromate has been studied spectrophotometrically in the presence of p–toluenesulphonic acid (PTSA) in dimethylsulphooxide(DMSO) as solvent. The reaction is first order with respect to oxidant and [H+]. Michaelis–Menten type kinetics is observed.The rate of reaction decreases with an increase in the polarity of solvent indicating an ion–dipole interaction in the slow step. The reactions exhibit no primary kinetic isotope effect. The activation parameters have been evaluated.