Pd(II) catalysis in oxidation of D-ribose and arabinose by chloramine-T in acidic medium: A kinetic study

Pushpanjali Singh and Roli Raghuvanshi

I-3 Block, Amity School of Business, Amity University, Sector-125 Noida, Gautam Budha Nagar (India).

ABSTRACT:

Kinetic investigations on Pd(II) catalyzed oxidation of D-ribose and D-arabinose by acidic solution of chloramine-T in the presence of mercuric acetate, as a scavenger have been made in the temperature range of 30°-45°C. The rate shows first order kinetics in case of chloramine-T and order of reaction is zero and one with respect to substrate and Pd(II) respectively. Increase in [Cl- ] showed positive effect, while [H+] showed zero effect.Negligible effect of mercuric acetate and ionic strength of the medium was observed. A transient complex, formed between PdCl2 and chloramine-T. PdCl2 being the reactive species of Palladium(II) chloride, disproportionates in a slow and rate determining step. Various activation parameters have been calculated. A suitable mechanism in agreement with observed kinetics has been proposed.

KEYWORDS:

Pd(II) chloride; Chloramine-T; D-Ribose and D-Arabinose

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Copy the following to cite this article: Singh P, Raghuvanshi R. Pd(II) catalysis in oxidation of D-ribose and arabinose by chloramine-T in acidic medium: A kinetic study. Orient J Chem 2009;25(4).

Copy the following to cite this URL: Singh P, Raghuvanshi R. Pd(II) catalysis in oxidation of D-ribose and arabinose by chloramine-T in acidic medium: A kinetic study. Orient J Chem 2009;25(4). Available from: http://www.orientjchem.org/?p=22719