Electron transfer reactions 11 conformers, preparation

R = trans-PQ R = H, R = m-PQ Q = 6, 7, 8, 9) rigidly and covalently linked by a cis- or /ra j-l,4-disubstituted cyclohexylene bridge has been prepared in which the acceptor strength of the quinone is variable. The conformation of the cyclohexane ring was determined in all cases. These compounds may be well-suited as biomimetic model compounds for the study of photoinduced electron transfer reactions in photosynthesis. 

Conformational equilibria of amines and aminoacids have been studied in low-temperature matrix under UV or IR irradiation." Amine-imine tautomerism and formation of a radical was observed from adenine. New studies on the aniline excited states has evidenced the role of Rydberg states. A re-examination of the Oilman reaction has demonstrated that this is an electron transfer process. The photo-cyclization of halogenated (iodine is by far to be preferred) N-ben lani-lines to phenanthridine has been studied with particular attention at the preparative value and the tolerance of alko)q, dio)q methylene and halogen substituents, to which it was found to be quite tolerant. ... 

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