Standard electrode potentials involving radicals in aqueous solution: inorganic radicals

Abstract Inorganic radicals, such as superoxide and hydroxyl, play an important role in biology. Their tendency to oxidize or to reduce other compounds has been studied by pulse radiolysis; electrode potentials can be derived when equilibrium is established with a well-known reference compound. An IUPAC Task Group has evaluated the literature and produced the recommended standard electrode potentials for such couples as (O 2 /O 2 ·- ), (HO · , H + /H 2 O), (O 3 /O 3 ·- ), (Cl 2 /Cl 2 ·- ), (Br 2 ·- /2Br - ), (NO 2 · /NO 2 - ), and (CO 3 ·- /CO 3 2- ).