Mechanism of Cupferron Electroreduction

Detailed mechanism of cupferron electroreduction can be judged only on the parameters of kinetics of the reduction process, and on final products established. No stable intermediates were obtained or detected till now. The mechanism suggested earlier by Kolthoff and Liberti (1948) is logically acceptable, but it includes some intermediates with doubtful stability. Analysis of published data on reduction kinetics of some substances closely related to cupferron allowed to make a supposition that diazonium cation can be a reasonable intermediate in this process