波谱学杂志 ›› 1987, Vol. 4 ›› Issue (4): 345-354.

• 研究论文 • 上一篇    下一篇

二苯甲酮与2-芳基-1,3-二噻烷衍生物光化夺氢反应中产生的活泼自由基的ESR研究

纪海星1, 徐广智1, 孙利军2, 师树简2   

  1. 1. 中国科学院化学研究所 北京;
    2. 北京化工学院
  • 收稿日期:1987-04-01 出版日期:1987-12-05 发布日期:2018-01-22
  • 基金资助:
    国家自然科学基金资助课题

ESR STUDY OF ACTIVE RADICALS PRODUCED IN THE PHOTOCHEMICAL HYDROGEN ABSTRACTION REACTIONS BETWEEN BENZOPHENONE AND 2-ARYL-1,3-DITHIOLAN

Ji Haixing1, Xu Guangzhi1, Sun Lijun2, Shi Shujian2   

  1. 1. Institute of Chemistry, Academia Sinica, Beijing;
    2. Beijing Institute of Chemical Technology
  • Received:1987-04-01 Online:1987-12-05 Published:2018-01-22

摘要: 本文用自旋捕捉技术与ESR相结合的方法,研究了九种2-芳基-1,3-二噻烷衍生物与二苯甲酮光化夺氢反应中产生的活泼自由基。结果表明,与硫原子相联的两个碳上的C-H键(即2位和4或6位碳的C-H键),都能发生均裂而生成较稳定的自由基。并均可为ND和TBN捕获而生成两种自由基加合物,其浓度比约为1:1。

关键词: 自旋捕捉技术, 2-芳基-1,3-二噻烷衍生物, 自由基, 光化夺氢反应, ESR

Abstract: The active radicals produced in the photochemical hydrogen abstraction reactions between benzophenone and 2-ary1-1, 3-dithiolan were studied by combination of spin trapping technique with ESR specroscopy. Results show that the homolytic cleavage of C-H on the 2-C (or 4-C, 6-C) could take place, the produced active radicals  CH2 werestabilized by the conjugation of adjacent sulphur atoms and could be trapped by nitrosodurene (ND) (or 2,4,6-tri-t-butylnitrosobenzene(TBN)) to form two spin adducts the concentration ratio of which was about 1:1.

Key words: Spin trapping technique, 2-aryl-1,3-dithiolan, Radical, Photochemical hydrogen abstraction reaction, ESR