Carbon-13 NMR spectra of benzene mono- and di-carboxylic acids and their analytical applications.

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概要

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• Carbon-13 NMR spectra of benzoic, and phthalic acids were compared both in D<SUB>2</SUB>O with an excess of sodium hydroxide and in a mixture of DMSO-<I>d</I><SUB>6</SUB> and H<SUB>2</SUB>O (4:1). Tight ion pair forms of benzoate anion were considered. A simple additive rule for isomeric phthalic acids was employed to assign the spectral peaks. These carboxylic acids gave characteristic peaks and so can be distinguished from others in mixtures. Quantitative analyses of these carboxylic acids with calibration curves are also possible by a simple preparation of basic D<SUB>2</SUB>O solutions. An example of the use of these data is the Henkel process (<I>cf.</I> Fig. 1) for the synthesis of terephthalic acid.

• 公益社団法人 日本化学会の論文

著者

• KOSUGI Yoshio

  Department of Applied Chemistry, Faculty of Engineering, Nagoya University

• Kosugi Yoshio

  Department of Synthetic Chemistry, Faculty of Engineering, Nagoya University

• Takeuchi Tsugio

  Department of Synthetic Chemistry, Faculty of Engineering, Nagoya University

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