Electrooxidation halide salts

Redox systems other than halide salts are also used for catalytic indirect electrooxidation. For instance, p-methoxytoluene (90) can be oxidized in an aqueous K2S2O8-(C02K)2 system to give anisaldehyde (91)... 

Electrooxidation of halide salts is quite useful for the generation of reactive species of halogen atoms under mild conditions. Functionalization of alkenes involving the formation of halohydrins, 1,2-halides, a-halo ketones, epoxides, allylic halides and others has been achieved by electrochemical reactions and is well documented in the literature. On the other hand, electrogenerated carbenium ions can be captured by nucleophilic halide anions, providing a new route to halogenated compounds... 

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