Sulfonyl group

In organosulfur chemistry, a sulfonyl group can refer either to a functional group found primarily in sulfones, or to a substituent obtained from a sulfonic acid by the removal of the hydroxyl group, similarly to acyl groups.: 1470–1476  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.: 53 

Not to be confused with Thiosulfonate or Sulfonate.

Sulfonyl groups can be reduced to the sulfide with DIBALH. Lithium aluminium hydride (LiAlH4) reduces some but not all sulfones to sulfides.: 1851 

In inorganic chemistry, when the group −S(=O)2− is not connected to any carbon atoms, it is referred to as sulfuryl.

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