Abstract

The kinetics of oxidation of aldoses by thallium(III) in acid perchlorate medium have been investigated under pseudo-first-order conditions. The oxidation rate of different aldoses, which is in the order d-ribose > d-arabinose > d-xylose > d-galactose > d-mannose > d-glucose, is explained on the basis of its correlation with the percentage of free aldehydo sugar. The rate decreases with increase in the acidity, and is strongly inhibited by chloride and acetate ions. Thermodynamic parameters are reported, and suitable mechanistic steps are proposed on the basis of the kinetic and stoichiometric results.

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