Primary stage of the reaction between ozone and chloride ions in aqueous solution: Oxidation of chloride ions with ozone through the mechanism of oxygen atom transfer

摘要

Relying on experimental data on products and the kinetic features of the complex reaction between O _3 and Cl ~? (aq), we establish that the primary stage of the reaction proceeds via a mechanism in which an oxygen atom is transferred from an ozone molecule to a chloride ion. Analyzing the thermodynamic parameters of the primary stage, we conclude that a long-lived intermediate complex of a chloride ion and ozone is initially formed. The mechanism of acid catalysis in the reaction between O _3 and Cl ~? (aq) is described as the formation of a protonated intermediate complex, HO _3 Cl, in the acidic medium and its rapid decomposition toward the formation of products.