EPR AND PROTON ENDOR STUDIES IN SINGLE-CRYSTALS OF POTASSIUM HYDROGEN THIODIACETATE

Radicals trapped in a gamma-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-CH-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-degrees-C), and was characterized by highly anisotropic g factors.