Kinetic Analysis of Reactivity of Substituted Benzoic Acids in the T-for-H Exchange Reaction

• SAWADA Yoshinori

  Graduate School of Science and Technology, Niigata University

• IMAIZUMI Hiroshi

  Department of Chemistry and Chemical Engineering, Faculty of Engineering, Niigata University

• KANO Naoki

  Department of Chemistry and Chemical Engineering, Faculty of Engineering, Niigata University

Bibliographic Information

Other Title

• Ｔ‐ｆｏｒ‐Ｈ交換反応における安息香酸誘導体の速度論的反応解析
• T-for-H交換反応における安息香酸誘導体の速度論的反応解析
• T for H コウカン ハンノウ ニ オケル アンソク コウサン ユウドウタイ ノ ソクドロンテキ ハンノウ カイセキ

Abstract

In order to clarify the effect of tritium(³H or T) on both the ecosystem and the reactivity of compounds including H atoms, the hydrogen-isotope exchange reaction(T-for-H exchange reaction) between each substituted hydroxybenzoic acid and tritium-labeled poly(vinyl alcohol) was observed in the range of 50 to 90°C. As a result, the radioactivity of the compounds was increased with the reaction time. Applying the A"-McKay plot method to the observed data obtained, the rate constants(k) of the functional groups in each compound were obtained. Comparing k with each other, the following seven matters have been clarified. (1)The reactivity of substituted hydroxybenzoic acid(and carboxylic acid) depends on temperature. (2)The reactivity of each functional group in the liquid-solid system is about 7 to 12 times the reactivity in the gas-solid system. (3)The reactivity of a certain substituted benzoic acid may be twice as large as that of another substituted one by resonance effect. (4)Applying the A"-McKay plot method, the reactivity of substituted hydroxybenzoic acids can be clarified under the condition of non-masking reagent. (5)The exchange reaction under a general environment can be inferred based on this work. (6)The reactivity of the carboxyl groups of the substituted hydroxybenzoic acid can be deduced by applying the Hammett rule. (7)The method used in this work is useful for evaluating the influence of T to environment.

Journal

• RADIOISOTOPES

  RADIOISOTOPES 57 (4), 233-240, 2008

  Japan Radioisotope Association

Keywords

• tritium
• substituted hydroxybenzoic acid
• T-for-H exchange reaction
• A"-Mckay plot method
• Hammett rule
• liquid-solid reaction

Details

• CRID: 1390282679132712832
• NII Article ID: 10021071614
• NII Book ID: AN00351589
• DOI: 10.3769/radioisotopes.57.233
• ISSN: 18844111
• ISSN: 00338303
• HANDLE: 10191/7166
• NDL BIB ID: 9480204
• Web Site: https://niigata-u.repo.nii.ac.jp/records/2565
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9480204
• Web Site: http://www.jstage.jst.go.jp/article/radioisotopes/57/4/57_4_233/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • IRDB
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed