ENDOR Studies on the Hindered Alkylbiphenyl Anion Radicals

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概要

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• ENDOR observations were carried out for the anion radicals of 2,2′-bitolyl, 2,2′-diethylbiphenyl, and 2,2′-diisopropylbiphenyl. The spin densities obtained from the ring protons at the <I>ortho</I>-positions showed a depression in the order of the spherical bulkiness of the substituents, and the degrees of the steric hindrance of the biphenyl ring were estimated based on McLachlan's MO calculation. ENDOR experiments demonstrated that methyl groups undergo free rotation, but it is greatly hindered in each higher alkyl derivative.

• 公益社団法人 日本化学会の論文

著者

• Mukai Kazuo

  Department Of Chemistry Faculty Of Science Ehime University

• Ishizu Kazuhiko

  Department Of Chemistry Faculty Of Science Ehime University

• Hasegawa Hideo

  Japan Electron Optics Laboratory

• Nemoto Fujito

  Department of Chemistry, Faculty of Science, Ehime University

• Kohno Masahiro

  Japan Electron Optics Laboratory

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