Nomenclature of Sulfenic, Sulfinic and Sulfonic Acids

The sulfenic acids, sulfinic acids and sulfonic acids have the general formula R-SOH, R-SO2H and R-SO3H, respectively.

Oxyacids derived from sulfur directly attached to an organic radical are named with the name of the hydrocarbon with the same number of carbons, ending in –sulfenic, –sulfinic and –sulfonic, respectively (recommendation C-641.1).

When acting as substituents, the suffixes –sulfene, –sulfino and –sulfo, respectively, are used (recommendation C-641.2).

Some common names such as sulfanilic acid, naphthionic acid and taurine have been retained.

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