Temperature dependent current-reversal chronopotentiometric reduction of nickel(IV), molybdenum(V) and tungsten(V) dithiocarbamates

Abstract

The electrochemical electron-transfer rate constants for the reduction of Ni(IV), Mo(V) and W(V) dithiocarbamates were measured at a platinum electrode in acetone with the current-reversal chronopotentiometric method in the temperature range −20 to +2°. From these measurements the activation energies were determined, ΔG≠ at 293 K, being 26, 25 and 24 kJ mol−1 respectively for these compounds. The electronic device used is also described and consists of a galvanostat, a comparator and measuring circuit and a digital programmer.