What is "sulfinic acid"

alt. (context chemistry English) the compound HS(=O)OH, and any of its S-hydrocarbyl derivatives n. (context chemistry English) the compound HS(=O)OH, and any of its S-hydrocarbyl derivatives

Sulfinic acids are oxoacids of sulfur with the structure RSO(OH). In these organosulfur compounds, sulfur is pyramidal.

They are often prepared in situ by acidification of the corresponding sulfinate salts, which are typically more robust than the acid. These salts are generated by reduction of sulfonyl chlorides. An alternative route is the reaction of Grignard reagents with sulfur dioxide. Transition metal sulfinates are also generated by insertion of sulfur dioxide into metal alkyls, a reaction that may proceed via a metal sulfur dioxide complex.