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E-Journal of Chemistry
Volume 6 (2009), Issue 1, Pages 273-280

Kinetics and Mechanism of the Oxidation of Lactic Acid and Mandelic Acid by Pyridinium Chlorochromate in Aqueous Acidic Medium

Sapana Jain, B. L. Hiran, and C. V. Bhatt

Chemical Kinetics and Polymer Research Laboratory, Department of Chemistry, University College of Science, Mohan Lal Sukhadia University, Udaipur-313001 (Raj.), India

Received 26 June 2008; Accepted 20 August 2008

Copyright © 2009 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Pyridinium chlorochromate (PCC) act as two electron oxidant in kinetic studies of the oxidation of lactic and mandelic acid in acidic medium. The influence of several factors such as acidity, salts, solvent composition and temperature on the reaction rate has been studied. The reaction shows first order dependence with respect to [PCC] and [H+]. The various thermodynamic parameters have been evaluated. Products as oxoacids and absence of free radical were confirmed. Suitable reaction mechanism has been proposed.