Mechanism of the copper(II)-catalysed peroxide oxidation of m-aminobenzoic acid and 1,3,5-trihydroxybenzene used for analytical purposes.
The mechanism of two indicator reactions, used for catalytic determination of copper-the oxidation of m-aminobenzoic acid and of 1,3,5-trihydroxybenzene by H(2)O(2)-was studied. It was found that, depending on the reaction conditions (reagent concentrations, acidity, temperature) the reactions can proceed according to two reaction mechanisms: (a) on the basis of a mixed-ligand catalyst-substrate-oxidant complex, or (b) through a radical mechanism with the formation of free radicals in the substrate oxidation. Direct experimental and kinetic data are shown, supporting the two reaction pathways.
Bontchev
P R
PR
Department of Analytical Chemistry, University of Sofia, 1126 Sofia, Bulgaria.
Gantcheva
S
S