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The kinetics and mechanism of the oxidation of benzyl alcohol and some ortho-substututed benzyl alcohols by pyridinium dichromate (PDC) in the presence of trichloroacetic acid (TCA) in 100% acetonitrile medium have been studied. The product of oxidation has been identified as the corresponding benzaldehyde. The stoichiometry of the reaction is found to be 1.5: 1. The reaction is first order each in substrate and oxidant concentrations. The mechanism of oxidation varies with the nature of the chromium (VI) species and the solvent used.