EPR and proton ENDOR studies in single crystals of potassium hydrogen thiodiacetate

Abstract

Radicals trapped in a γ-irradiated single crystal of potassium hydrogen thiodiacetate have been investigated using the techniques of EPR and ENDOR. A radical of the type HO₂C—CH₂—S—ĊH—CO₂H was observed and analysed. The second radical could not be analysed, owing to overlap of the spectrum and only information about the g factors could be obtained. The third radical observed was of the type RCH₂—S, formed by the scission of the S—C bond, and was observable only at low temperatures (below –100 °C), and was characterized by highly anisotropic g factors.