“…On the other hand, the two-electron oxidation is so favourable that, in the case of CIO-, and BrO-, but not IO-, formation of singlet (Ia~) dioxygen is thermodynamically possible (Schemes 1-3), in agreement with experimental observations [14,15]. Reduction of hypochlorous acid by superoxide is possible followed by formation of the hydroxyl radical, and has been described [16][17][18]. The formation of hydroxyl radical and chloride from HOCI', the hydroxochlorate(1-) radical, is only slightly favourable [19].…”