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E-Journal of Chemistry
Volume 6, Issue 1, Pages 237-246
http://dx.doi.org/10.1155/2009/907071

Oxidation of Some Aliphatic Alcohols by Pyridinium Chlorochromate -Kinetics and Mechanism

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

Chemical Kinetics and Polymer Research Laboratory, Department of Chemistry, Mohan Lal Sukhadia. University, Udaipur (Raj)-313 001, 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.

Abstract

Kinetics of oxidation of some aliphatic primary and secondary alcohols viz., ethanol, propan-1-ol, propan-2-ol, butan-1-ol, butan-2-ol and 2-methyl butanol by pyridinium chlorochromate (PCC) have been studied in water- perchloric acid medium. The reaction shows first order dependence with respect to pyridinium chlorochromate [PCC] and hydrogen ion [H+]. The rate of oxidation decreases with increase in dielectric constant of solvent suggests ion-dipole interaction. Activation parameters have been evaluated. Products are carbonyl compounds and free radical absence was proved. A tentative mechanism has been proposed.