Unstable intermediates. Part CLIX. Dihalide anions and related species as products in the radiolysis of organic halides

Abstract

Electron addition to 1,2-dihalides gave Hal₂^–σ* radicals, characterised by their e.s.r. spectra. Electron loss often gave a similar species, containing two equivalent halogen atoms, which is identified as the dimer cation, RHal–HaIR⁺, isostructural with the well-established disulphide anion, RS–SR^–. A third species in this class only formed by iodides, containing two different iodine atoms, is thought to be RI–I. Iodoacetic acid and iodoethanol gave a species thought to be IO^2– or IOH^–, having e.s.r. spectra characteristic of iodine in σ* radicals.