ELECTROCHEMICAL-BEHAVIOR OF ALDICARB

The electrochemical reduction behaviour of aldicarb ethylthio)propanal dehyde-O-(methylcarbamoyl)oxime] (1), an insecticide has been studied in the pH range 2-12 including 1 M HClO4 and 1 M HCl in EtOH-water mix tures by employing d.c. polarography, cyclic voltammetry, a.c. polarog raphy and differential pulse polarography. The number of electrons in the electrode process is determined by millicoulometry. The azomethine group is found to be reducible in 4e- process in solutions of pH less -than-or-equal-to 4. The C=N-O linkage is observed to be reduced by a mechanism involving reductive fission of the N-O bond. Kinetic paramet ers such as diffusion coefficient and heterogeneous forward rate const ants have been evaluated and reported.