Abstract

[10490-22-9] C4H9ClO2S (MW 156.63) InChI = 1S/C4H9ClO2S/c1-4(2,3)8(5,6)7/h1-3H3 InChIKey = WFBUQJSXXDVYFZ-UHFFFAOYSA-N (sulfonylating agent, percursor to tert-butyl cations) Alternate Name: 2-methylpropane-2-sulfonyl chloride, trimethylmethanesulfonyl chloride, 2-methyl-2-propanesulfonyl chloride, BusCl. Physical Data: white solid, mp 95 °C. Solubility: soluble in most common organic solvents. Form Supplied in: not commercially available. Preparative Methods: from tert-butylmagnesium chloride and excess sulfur dioxide or from the sulfinic acid.1 Purification vacuum sublimation.1 Handling, Storage, and Precautions: this reagent is not stable at ambient temperature, decomposing with a half-life of approx. 34 h at 35 °C to tert-butyl chloride, isobutylene, sulfur dioxide, and hydrogen chloride.1

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