Kinetics and Mechanism of Picolinic Acid Promoted Chromium(VI) Oxidation of Dimethyl Sulfoxide in the Presence and Absence of Surfactants
Abstract
In the picolinic acid (PA) promoted CrVI oxidation of dimethyl sulfoxide (DMSO), the CrVI–PA complex formed at the pre-equilibrium step undergoes nucleophilic attack by the S of DMSO to form a positively charged reactive intermediate which experiences an oxygen transfer or a ligand coupling to give the products; the anionic surfactant (SDS) accelerates the process while the cationic surfactant (CPC) retards the reaction.