Abstract
The oxidation of N-methylaniline by peroxomonosulfuric acid (PMSA) obeys second order kinetics - first order each in [PMSA] and [N-methylaniline] at constant pH. The observed pH-rate profile has been rationalized by invoking various PMSA species and the unprotonated form of the amine as reactive species; the reactivities of these species have been estimated. The mechanism of oxidation involves the nucleophilic attack of amine lone-pair on the electrophillic peroxo oxygen. N-Methylaniline reacts at a faster rate with PMSA species than N,N-dimethylaniline.
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