On the electron spin resonance detection of RS radicals in irradiated solids: radicals of type RSSR–, RS–SR2, and R2SSR2+

Abstract

It is suggested that radicals previously identified as RS, having g tensor components in the 2·002, 2·025, and 2·060 regions are better described as RS–SR₂σ* radicals, structurally similar to the established radical anions, RS–SR^–. Furthermore, a radical in irradiated thiodiglycolic acid previously thought to be (HO₂CCH₂)₂S⁺ is almost certainly the dimer-cation (HO₂CCH₂)₂S–S(CH₂CO₂H ₂)⁺. The type of spectrum expected for RS radicals including HS is discussed, together with possible assignments.