Abstract
The kinetics and mechanism of Ru(III)-catalysed oxidation of glycollic and mandelic acids by N-bromo-succinimide (NBS) have been studied in acidic medium in the presence of mercuric acetate as a scavenger in the temperature range 30–45°C. The reactions follow identical kinetics. The rate shows a first-order dependence on [NBS], [substrate], [Ru(III)] and [Cl −]. Negligible effects of [H +], mercuric acetate and ionic strength have been observed. A negative effect of succinimide and acetic acid is observed on the reaction rate. Various activation parameters have been computed. Glyoxylic acid and benzoyl formic acid have been identified as the products, and a suitable mechanism in conformity with the kinetic results has been proposed.
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