ELECTROCHEMICAL REDUCTION OF N-SUBSTITUTED 2-AMINO-3-CHLORO-1,4-NAPHTHOQUINONES

Electrochemical properties of several N-substituted 2-amino-3-chloro-1 ,4-naphthoquinones in acetonitrile (with tetrabutylammonium tetrafluor oborate as the supporting electrolyte) are studied by the cyclic volta mmetry and rotating ring-disk electrode methods. It is shown that the electrochemical reduction of these compounds yields stable radical ani ons and dianions. A simple voltammetric method is proposed for estimat ing the reactivity of quinones with respect to the radical anion of ox ygen.