Abstract: Electron spin resonance measurement was performed for new tocopheroxyl model radical (7-t-butyl-4-isopropyl-2, 2-dimethyl-6-chromanoxyl radical)obtained from a new tocopherol model compound initiated by di-t-butyl peroxide in toluene.The proton hyperfine coupling constants and g_iso-value were determined.The computer simulation spectrum was made by use of these hyperfine coupling constants.

Key words: Tocopherol, Free radical, ESR, Hyperfine spitting