Abstract
The electrochemical oxidation of dibenzo( c, e)-1,2-diselenine 1b has been investigated in acetonitrile medium by voltammetry at rotating platinum electrode, cyclic voltammetry and constant potential coulometry. The exhaustive oxidation of compound 1b exclusively leads to the formation of the monoxide of dibenzo( b, d)selenophene with concomitant extrusion of selenium dioxide. The influence of the duration and the temperature of the electrolysis is reported. Each step of the electrochemical oxidation is described in detail. Comparison with the chemical and electrochemical oxidation of dibenzo( c, e)-1,2- dithiine and the chemical oxidation of cyclic vic-diselenide is discussed.
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