Magnetic circular dichroism studies on o-, m-, and p-nitroanilines and o-, m-, and p-aminobenzoic acids.

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概要

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• The MCD and UV spectra of <I>o</I>-, <I>m</I>-, and <I>p</I>-nitroanilines and <I>o</I>-, <I>m</I>-, and <I>p</I>-aminobenzoic acids were measured. Some ambiguous absorption bands, which strongly overlap each other, can be separated in the MCD spectra. The Faraday <I>B</I> terms were calculated using wave functions obtained from the Pariser-Parr-Pople (PPP) method; the values are in good agreement with the experimental values derived from the MCD spectra. The spectral assignments are discussed not only by comparing the excited states of nitroanilines and aminobenzoic acids with those of benzene itself, but also by taking account of the electron migration between the benzene ring and the substituent groups. On the other hand, it turns out from the measurements of the MCD spectra that the zwitterion, C<SUB>6</SUB>H<SUB>4</SUB>(NH<SUB>3</SUB><SUP>+</SUP>)CO<SUB>2</SUB><SUP>−</SUP>, exists in aqueous solutions of <I>o</I>- and <I>m</I>-aminobenzoic acids.

• 公益社団法人 日本化学会の論文

著者

• Hatano Masahiro

  Chemical Research Institure Of Non-aqueous Solutions Tohoku University

• Tajiri Akio

  Chemical Research Institute of Non-aqueous Solutions, Tohoku University

• Kaito Akira

  Chemical Research Institute of Non-aqueous Solutions, Tohoku University

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