Some aspects of the photochemistry

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carboncarbon bond length values are: 1.33 A in ethene (double bond),. 1.40 A in benzene (aromatic), ..... cooling down to ca. 77 K or less, and thus well below .... Kikuchi, N. Nakahara, T. Wakabayashi, M. Honda, H. Matsumiya, T. Moriwaki, S.