Abstract γ-Radiolysis of triphenylcyanocyclobutane (1) in benzene forms stilbene, cinnamonitrile and a stereo isomer of 1. The effect of additives and the kinetic treatment show that the cycloreversion of 1 proceeds by benzene triplet sensitization. Spectroscopic measurement in pulse radiolysis suggests the existence of 1,4-biradical as an intermediate.
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Kitamura et al. (1980) studied this question.
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