Reed reaction

The Reed reaction is a chemical reaction that utilizes light to oxidize hydrocarbons to sulfonyl chlorides. The reaction performs via the free radicals. First, the light makes a molecule of chlorine dissociate homolytically, then a chlorine atom produced attacks the hydrocarbon chain to form hydrogen chloride what results in the formation of alkyl free radical. Then SO₂ as an electron donor bonds to the reaction center, forming an sulfonyl radical. Finally, the least one attacks another chlorine molecule to produce a sulfonyl chloride and a new chlorine atom which continues the reaction chain.