Abstract
Thermodynamic and kinetic studies and mechanism of manganese(VII) oxidation of L-histidine has been studied both in the absence and presence of silver(I) in aqueous sulfuric acid medium. Various hypotheses for the mechanism of acid catalysis have been tested and it has been found that rate is related to the activity of water in accord with Bunnett's hypothesis. The energy and entropy of activation and frequency factor have been calculated using the Arrhenius and Eyring plots. Mechanisms in agreement with the observations are reported. The experimental rate law for the both uncatalyzed reaction and in the presence of silver was found. The applicability of Burnett's theory has been tested.
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