Abstract
ESR spectra of the radical species derived from 60Co γ-ray irradiation of 1,3,5-cycloheptatriene (1,3,5-CYT) and 1,3-cycloheptadiene (1,3-CYD) in halocarbon matrices have been studied in the temperature range 70–103 K. Ring inversion across the molecular plane occurs in the radical cation 1,3,5-CYT + in CCl 3CF 3, the activation energy being 1.7 kcal/mol. Above 90 K, 1,3,5-CYT + is deprotonated thermally in CCl 2FCClF 2. No dynamical effect has been observed for 1,3-CYD + .
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