高等学校化学学报 ›› 2000, Vol. 21 ›› Issue (6): 952.

• 研究简报 • 上一篇    下一篇

3-己炔-2,5-二醇电还原中间产物的ESR研究

袁国伟1, 张敬东2, 宋又群2, 黄树坤2, 孙健3   

  1. 1. 广州市二轻科学技术研究所, 广州 510170;
    2. 湖南大学化学化工学院, 长沙 410082;
    3. 中国科学院化学研究所, 北京 100080
  • 收稿日期:1999-04-27 出版日期:2000-06-24 发布日期:2000-06-24
  • 通讯作者: 黄树坤(1935年出生),男,教授,从事有机反应的电化学-ESR研究.
  • 基金资助:

    中国科学院化学研究所分子动态及稳态结构国家重点实验室资助;国家自然科学基金(批准号:29773012)

ESR Study of Intermediates in Electroreduction of 3-Hexyne-2,5-diol

YUAN Guo-Wei1, ZHANG Jing-Dong2, SONG You-Qun2, HUANG Shu-Kun2, SUN Jian3   

  1. 1. Scientific&Technical Research Instituteof Guangz hou No.2 Ligh t Industries, Guangz hou 510170, China;
    2. College of Chemistryand Chemical Engineering, Hunan University, Changsha 410082, China;
    3. Instituteof Chemistry, Chinese Academy of Sciences, Beijing 100080, China
  • Received:1999-04-27 Online:2000-06-24 Published:2000-06-24

关键词: 3-己炔-2, 5-二醇, 电还原, 电化学-ESR, 自旋捕获

Abstract: The intermediates of electroreduction of 3-hexyne-2,5-diol at platinized platinum electrode in perchlorate aqueous solutions with various pHvalues have been studied by using electrochemical ESRtechnique with the spin trap phenyl tert butyl nitrone. The six-line spectra in the three solutions with 1.5, 3.5 and 5.0 pHvalues could be ascribed to the form of the radicals, such as CH3C·HC——CCH2CH3 , in the process of producing 3-hexyne. The four-line spectra, increasing in their intensities with increase in pHvalues from 1.5 to 5.0, show that a 2-hydroxyalkyl radical CH3C·(OH)CH=CHCH(OH)CH3 is formed via the interaction between the atom Hand intermediates 3-hexene-2,5-diol and/or CH3C(=O)·CH-CHCH(OH)CH3.

Key words: 3-Hexyne-2,5 diol, Electroreduction, Electrochemical-ESR, Spin trapping

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