The products of the title reaction of I in aqueous HCl were the corresponding hydroxylamine and cysteic acid. The stoichiometry of the reaction, determine by the TLC scan method, was 3:1. According to a cyclic voltammetric study, a one-electron-transfer process is involved in the reaction. Stop-flow UV kinetic experiments showed that the reaction was first order in both reactants; the reaction rate decreased with increasing acidity of the medium.

Key words: AMMONIUM COMPOUND, PIPERIDINE P, AQUEOUS SOLUTION, OXYGEN, REACTION MECHANISM, NITROGEN, BROMIDE, FREE RADICAL, OXYGEN COMPOUNDS, CYSTEINE