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外文期刊>israel journal of chemistry
>Activation of Superoxide Ion by Reactions with Protons, Electrophiles, Secondary Amines, Radicals, and Reduced Metal· Ions
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Activation of Superoxide Ion by Reactions with Protons, Electrophiles, Secondary Amines, Radicals, and Reduced Metal· Ions
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机译：Activation of Superoxide Ion by Reactions with Protons, Electrophiles, Secondary Amines, Radicals, and Reduced Metal· Ions
AbstractIn aprotic and aqueous media the proton‐induced disproportionation of superoxide ion (O−2) yields a variety of reactive species (HO2·, H2O2, HO−2, and · OH). In aprotic media O−2rapidly degrades polychlorinated hydrocarbons (CCl4, HCCl3, and DDT) to oxygenated products (CCl4→Cl3COO·; HCCl3→ Cl2C: and Cl2C=O). Alkyl halides react more slowly (BuCl →BuOO· and BuOO−). Formation of O−2in the presence of methyl viologen (MV2+), reduced flavins, esters, and low‐valent transition metal complexes results in the formation of reactive oxygenating agents and reaction mimics for oxygenases MV+‐OO‐, 4a‐hydroperoxyflavins, RC(O)OO−, and Zn11(O2·)+. Kinetic data for the proton‐induced disproportionation of O−2in water and the nucleophilic reactions of O−2in aprotic solvents lead to the conclusion that the latter are probably of little significanc
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