Ácido sulfínico: Diferenzas entre revisións

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.<ref>{{ OrgSynth | author = Whitmore, F. C.; Hamilton, F. H. | prep = cv1p0492 | title = Sodium p-Toluenesulfinic acid | collvol = 1 | collvolpages = 492 | year = 1941 }}</ref> An alternative route is the reaction of [[Grignard reagent]]s 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]].

 

An example of a simple, well-studied sulfinic acid is [[phenylsulfinic acid]]. A commercially important sulfinic acid is [[thiourea dioxide]], which is prepared by the [[oxidation]] of thiourea with [[hydrogen peroxide]].<ref name=Ull>D. Schubart "Sulfinic Acids and Derivatives" in Ullmann's Encyclopedia of Industrial Chemistry 2012, Wiley-VCH, Weinheim. {{DOI|10.1002/14356007.a25_461}}</ref>

:(NH₂)₂CS + 2H₂O₂ → (NH)(NH₂)CSO₂H + 2H₂O