Free radicals in γ-irradiated disodium succinate. Part 1. Monoclinic crystals

15 September 1970

journal article
Published by Canadian Science Publishing in Canadian Journal of Chemistry

Vol. 48 (18) , 2804-2808
https://doi.org/10.1139/v70-473

Abstract

Crystals of disodium succinate have two distinct modifications, monoclinic and triclinic. These were recognized by electron spin resonance (e.s.r.) studies of. the free radicals produced by γ-irradiation. In the monoclinic crystals, e.s.r. spectra and radiation processes appear similar to those observed in γ- (or x-) irradiated succinic acid. The situation in triclinic crystals is more complex (see Part 2). In monoclinic crystals irradiated at 77 °K, two types of radical coexist. They were identified as ⁻O₂CCH₂CH₂ĊO₂²⁻, 1, together with a distorted conformation of the radical ⁻O₂C(ĊHCH₂)*CO₂⁻, 2. On warming to room temperature the former species disappears while the latter changes irreversibly to a stable conformation ⁻O₂CĊHCH₂CO₂⁻, 3.

Keywords

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