Sulfenic acid

While sulfenic acids have the potential of exhibiting tautomerism, spectroscopic measurements as well as theoretical studies indicate that the structure on the left predominates almost exclusively.

In chemistry, a sulfenic acid is an organosulfur compound and oxoacid with the general formula R−S−OH. It is the first member of the family of organosulfur oxoacids, which also include sulfinic acids (R−S(=O)OH) and sulfonic acids (R−S(=O)2OH), respectively. The base member of the sulfenic acid series with R = H is hydrogen thioperoxide.