Kinetics and Mechanism of Oxidation of Acetophenone Oximes with Bi(V) in HClO4-HF Mixture

Abstract

Kinetics of oxidation of acetophenone oxime and its para substituted derivatives with Bi(V) fluoride complex is studied in HClO₄ (1.0 M) and HF (1.5 M) mixture at 30°C. The product analysis indicates that the rate increases with the increase in concentration of hydrogen ions. The rate follows first order kinetics each in Bi(V) and oxime. The mode of electron transfer from the substrate to the Bi(V) has been indicated via bridged outer sphere mechanism. The mechanism involving the formation of an iminoxy radical in the rate determining step is proposed.