Author(s): AA. Osunlaja, SO. Idris,JF. Iyunand A. Uzairu
The stoichiometry, kinetics and mechanism of oxidation of 1,3-dimethylthiourea by 3,7-bis(dimethylamino)phenazothionium chloride have been studied in aqueous hydrochloric acid in the (8 –70) x 10-2mol dm-3 range. The rate shows a first order dependence on the substrates, a linear first order dependence on [H+] and a positive salt effect. One mole of the oxidant is consumed per mol of the reductant to give the corresponding urea derivative and other products. A mechanism consistent with the experimental data has been proposed.