Effects of <I>para</I>-Substituents on the Rates of Inversion of Biphenyl Derivatives. I. 5,7-Dihydrodibenzo[<I>c</I>,<I>e</I>]thiepins

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概要

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• Several 3,9-disubstituted 5,7-dihydrodibenzo[<I>c</I>,<I>e</I>]thiepins were synthesized and temperature dependence of their NMR spectra was examined. All the substituted derivatives showed a lower energy barrier to inversion than the unsubstituted one. The effects of the substituents on the energy barrier may be interpreted in terms of resonance stabilization and/or out-of-plane bending of the axis bond at the transition state.

• 公益社団法人 日本化学会の論文

著者

• Yamamoto Gaku

  Department Of Chemistry Faculty Of Science The University Of Tokyo

• Iwamura Hiizu

  Department Of Chemistry Faculty Of Science The University Of Tokyo

• Oki Michinori

  Department Of Chemistry Faculty Of Science Okawama University Of Science

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