二苯甲酮与烃的光化夺氢反应中产生的活泼自由基的ESR研究

波谱学杂志 ›› 1986, Vol. 3 ›› Issue (2): 125-130.

二苯甲酮与烃的光化夺氢反应中产生的活泼自由基的ESR研究

纪海星, 徐广智

中国科学院化学研究所, 北京

收稿日期:1985-09-04 修回日期:1985-12-17 出版日期:1986-06-05 发布日期:2018-01-23

AN ESR STUDY OF ACTIVE RADICALS PRODUCED IN THE PHOTOCHEMICAL HYDROGEN ABSTRACTION REACTIONS BETWEEN BENZOPHENONE AND HYDROCARBONS

Ji Haixing, Xu Guangzhi

Institute of chemistry, Academia sinica, Beijing

Received:1985-09-04 Revised:1985-12-17 Online:1986-06-05 Published:2018-01-23

摘要/Abstract

摘要： 本文用具立体阻碍的自旋捕捉剂2,4,6-三-特丁基亚硝基苯(TBN)与ESR相结合的方法,研究了十种烷烃及四种芳烃与二苯甲酮光化夺氢反应中产生的活泼自由基。结果表明,R₃R₂R₁Ċ和TBN形成烷氧苯胺自由基加合物。R-ĊH-R'与TBN形成烷氧苯胺自由基加合物和氮氧自由基加合物。TBN可用于区分有、无空间位阻的烷烃,芳烃自由基。自旋加合物的ESR波谱可表明自由基中未偶电子所在碳原子附近的有效质子数目。

Abstract: The active radicals produced in the photochemical hydrogen abstraction reactions between benzophenone and aliphatic or aromat;c hydrocarbons have been studied by combination of spin trapping reagent 2,4, 6-tri-t-butylnitrosobenzene (TBN) by ESR spectroscopy.Results show that R₃R₂R₁Ċ reacts with TBN to form N-alkoxyanilino spin adducts, and RĊHR' reacts with TBN to form both N-alkoxyanilino and Nitroxide spin adduets.Therefore, TBN may be used for distinguishing radicals from aliphatic or aromatic hydrocarbons with and without steric hindrance.

纪海星, 徐广智. 二苯甲酮与烃的光化夺氢反应中产生的活泼自由基的ESR研究[J]. 波谱学杂志, 1986, 3(2): 125-130.

Ji Haixing, Xu Guangzhi. AN ESR STUDY OF ACTIVE RADICALS PRODUCED IN THE PHOTOCHEMICAL HYDROGEN ABSTRACTION REACTIONS BETWEEN BENZOPHENONE AND HYDROCARBONS[J]. Chinese Journal of Magnetic Resonance, 1986, 3(2): 125-130.