Mécanisme des réactions du chlorite et du dioxyde de chlore. 2. Cinétique des réactions du chlorite en présence d'ortho-tolidine

With added ortho-tolidine (NH2RNH2) in order to eliminate complicating side reactions of the intermediate products of the disproportionation of chlorite, the stoichiometry is HClO2 + 2NH2RNH2 → Cl− + H+ + 2NHRNH + 2H2O. No chlorate is formed. The rate law, in the absence of chloride ions, is[Formula: see text]k = 269 M−1 s−1 at 25 °C and 1 M ionic strength. Without added iron, the observed rate is only due to the small amount of iron always present as an impurity in the reactants. Thus the reaction [Formula: see text] is not an elementary reaction.