STERIC EFFECTS IN THE OXIDATION OF SUBSTITUTED BENZOIC ACIDS BY QUINOLINIUM DICHROMATE

摘要

The importance of steric parameters in the quinolinium dichromate (QDC) oxidation of substituted benzoic acids,in sulphuric acid medium,has been highlighted.It was observed that the rate of the reaction was dependent on the first powers of the concentrations of the reactants (substrate,oxidant and acid).The rate-determining step involved the formation of a cyclic chromate ester,which underwent decomposition to give the corresponding hydroxybenzoic acids.