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Methanesulfonyl chloride
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Methanesulfonyl chloride : ウィキペディア英語版
Methanesulfonyl chloride

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Methanesulfonyl chloride (mesyl chloride) is an organosulfur compound with the formula CH3SO2Cl. It is a colourless liquid that dissolves in polar organic solvents but is reactive toward water, alcohols, and many amines. The simplest organic sulfonyl chloride, it is used to make methanesulfonates and to generate the elusive molecule sulfene.〔Valerie Vaillancourt, Michele M. Cudahy, Matthew M. Kreilein and Danielle L. Jacobs "Methanesulfonyl Chloride" in E-EROS Encyclopedia for Reagents in Organic Synthesis. 〕
==Preparation==
It is manufactured by the reaction of methane and sulfuryl chloride in a radical reaction:
:CH4 + SO2Cl2 → CH3SO2Cl + HCl
Another method of manufacture entails chlorination of methanesulfonic acid with thionyl chloride or phosgene:
:CH3SO3H + SOCl2 → CH3SO2Cl + SO2 + HCl
:CH3SO3H + COCl2 → CH3SO2Cl + CO2 + HCl

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