Charge-transfer interactions between 2-vinylnaphthalene (VN) in the excited singlet state and amines in the ground state significanty alter the product distribution in the photochemical reaction of VN, increasing the trans: cis ratio of 1,2-di(2-naphthyl)cyclobutane from 1 : 10 in the absence of amines to ca. 2 : 1 in the presence of 1,4-diazabicyclo[2.2.2]octane.
Y. Shirota, A. Nishikata, T. Aoyama, J. Saimatsu, S. Oh and H. Mikawa, J. Chem. Soc., Chem. Commun., 1984, 64 DOI: 10.1039/C39840000064
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