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[2.n]Metacyclophanes of which various kinds of functional groups were introduced into the aromatic rings have been synthesized in order to evaluate the specific through-space interaction in cyclophane... systems. The cationic character in the metacyclophanediazonium salts was found to be strongly affected by the electronic effect of the substituent on the opposite aromatic ring via the through-space interaction between two aromatic rings. Spectral properties of disubstituted metacyclophanes and stilbenophanes showed that a [2.n]metacyclophane can be regarded as a nonplanar molecule with one conjugated system due to a strong through-space interaction. Such an interaction of the [2.3]system has been proved to decreasein comparison with that of the [2.2]system.続きを見る
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