Separation of Electronic and Steric Effects: Oxidation of ortho-substitued N,-#alpha#-Diphenylnitrones by Pyridinium Fluorochromate in Aqueous DMF Medium

摘要

The kinetics of oxidation of some ortho-substituted N,#alpha#-diphenylnitrones with pyridinium fluorochromate (PFC) in aqueous DMF medium have been investigated. The rate equation v=k[nitrone][oxidant]is found to be valid.Regression analyses of the rate data by suing Taft and Charton equation to separate steric effect form electronic effects have been carried out. Results indicate that thd steric effect plays a major role while localizde and resonance effects play a minor role.