ā¦from air/nitric oxide-catalyzed oxidation of dimethyl sulfide, which in turn is a major by-product of the Kraft sulfate process for the manufacture of paper. More-vigorous oxidation of sulfides or sulfoxidesāas, for example, with potassium permanganate, KMnO4āproduces sulfones. Optically active sulfoxides can be prepared by oxidizing sulfides of type RSRā², whereā¦
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