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Sulfonyl halide : ウィキペディア英語版 | Sulfonyl halide Sulfonyl halide groups occur when a sulfonyl functional group is singly bonded to a halogen atom. They have the general formula R-SO2-X where X is a halogen. The stability of sulfonyl halides decreases in the order fluorides>chlorides>bromides>iodides, all four types being well known. The sulfonyl chlorides are of dominant importance in this series. ==Structure== Sulfonyl halides have tetrahedral sulfur centres attached to two oxygen atoms, an organic radical, and a halide. In a representative example, methanesulfonyl chloride, the S=O, S-C, and S-Cl bond distances are respectively 1.424, 1.763, and 2.046 Å.
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