Oxidations of thiols and thioethers Oxidations of thiols or thioethers lead to the corresponding sulfonyl chlorides and sulfones using either chlorine or hydrogen peroxide with a catalyst. Especially the oxidation of thiols with chlorine is a suitable and specific path to alkyl sulfonyl chlorides. Reaction scheme Strengths - direct and easy access to alkyl sulfonyl chlorides and sulfones - process gas recycling For specific products please check product groups sulfonic acid derivatives.