The kinetics of the slow coupling of CO2 with the anion-radical of 4-keto isophorone (4KI) in acetonitrile and on a gold/amalgamated electrode has been analyzed by using cyclic voltammetry and double potential step chronoamperometry. The coupling rate is estimated as 0.35 s-1 and the electrode mechanism at slow sweep rates (nu < 1 V s-1) is predominantly DISP1.
4-keto isophorone; kinetcs; CO2 and ECE-DISP mechanism
