Table of Contents
Research Letters in Inorganic Chemistry
Volume 2008 (2008), Article ID 216058, 5 pages
Research Letter

Mechanistic Aspects of Osmium(VIII) Catalyzed Oxidation of L-Tryptophan by Diperiodatocuprate(III) in Aqueous Alkaline Medium: A Kinetic Model

P.G. Department of Studies in Chemistry, Karnatak University, Dharwad 580 003, India

Received 24 November 2008; Accepted 11 December 2008

Academic Editor: Wolgang Linert

Copyright © 2008 Nagaraj P. Shetti et al. 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.


In presence of osmium(VIII), the reaction between L-tryptophan and diperiodatocuprate(III) DPC in alkaline medium exhibits 1:4 stochiometry (L-tryptophan:DPC). The reaction shows first-order dependence on [DPC] and [osmium(VIII)], less than unit order in both [L-tryptophan] and [alkali], and negative fractional order in [periodate]. The active species of catalyst and oxidant have been identified. The main products were identified by spectral studies and spot test. The probable mechanism was proposed and discussed.