Dialkyl and diary1 monoselenides are oxidised to selenoxides by an equimolar quantity of ozone. Diselenides react with three mol. of ozone, to give seleninic anhydrides; the same products are formed on oxidation with t-butyl hydroperoxide under anhydrous conditions. In neither case were intermediate products isolable. A possible mechanism of oxidation is discussed and the rates of ozonisation of mono-and di-selenides are compared with those ...
