Polarographic study on the kinetics and mechanism of the hydrolysis of 1,2,3,-cyclohexanetrione 1,3-dioxime

Abstract

The hydrolysis of 1,2,3-cyclohexanetrione 1,3-dioxime was studied polarographically in the presence of different concentrations of the perchloric acid, by measuring the diffusion current intensity of the first polarographic wave with $ E_1 \over 2 = - 440$ mV. First order rate constants were derived and the influence of perchloric acid concentration and temperature was studied. The results are discussed by presuming a reaction mechanism consisting of a protolytic pre-equilibrium, followed by a slow competitive water addition onto both the protonated and non-protonated forms of the dioxime. The final step is presumed to be a fast elimination of hydroxylamine.