Sulfonyl

The structure of the sulfonyl group

A sulfonyl group is an organic radical or functional group obtained from a sulfonic acid by the removal of the hydroxyl group. Sulfonyl groups can be written as having the general formula R-S(=O)₂-R', where there are two double bonds between the sulfur and oxygen. The names of sulfonyl groups typically end in -syl, such as in tosyl chloride which is p-toluenesulfonyl chloride, CH₃C₆H₄SO₂Cl or mesyl chloride which is methylsulfonyl chloride, CH₃SO₂Cl. Sulfonyl groups can be reduced to the hydrocarbon with lithium aluminium hydride (LiAlH₄).Template:Inorganic-compound-stub