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Free keywords:
ESR; Nitrogen-centred radicals; 2,3-Dihydro-1-oxo-1λ4,2,3,5-thiatriazol-3-yl radicals
Abstract:
Dehydrogenation of 2,5‐dihydro‐1,2,3,5‐thiatriazole 1‐oxides with thermally formed bis(4‐methylphenyl)aminyl generated 2,3‐dihydro‐1‐oxo‐1λ4,2,3,5‐thiatriazol‐3‐yl radicals. ESR, ENDOR and triple resonance studies in combination with 15N labelling yielded the magnitude and assignment of all 1H and 14N hyperfine coupling (HFC) constants. The radicals have a basic five‐π‐electron amidrazon‐2‐yl structure with the highest spin density at N‐2.