AN ESR STUDY ON THE PHOTOCHEMICAL HYDROGEN ABSTRACTION BETWEEN N-BROMOSUCCINIMIDE AND ALCOHOL OR HYDROCARBON

Chinese Journal of Magnetic Resonance ›› 1989, Vol. 6 ›› Issue (1): 71-76.

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AN ESR STUDY ON THE PHOTOCHEMICAL HYDROGEN ABSTRACTION BETWEEN N-BROMOSUCCINIMIDE AND ALCOHOL OR HYDROCARBON

Cao Han, Liu Yang, Wang Wending, Xu Guangzhi, Liang Renyou

Institute of Chemistry, Academia Sinica, Beijing

Received:1987-12-28 Revised:1988-05-20 Published:1989-03-05 Online:2018-01-22

Abstract

Abstract: Free radicals produced in the photolysis of N-Bromosuccinimide (NBS) or hydrogen abstraction reaction between Br. and alcohol or hydrocarbon have been studied by a combination of spin trapping technique and ESR spectrometer. The results show that:
1. Under the UV irradiation a homolytic cleavage of the N-Br bond in NBS occurs.
2. For alcohol and alkanc, the Br abstracted hydrogen on the tertiary carbon and tertiary carbon radical was formed.
3. For substituted benzene, Br abstracted hydrogen on the secondary or tertiary carbon and secondary or tertiary carbon radicals were formed.

Key words: N-bromosuccinimidc, Photolysis, Hydrogen abstraction, ESR, Spin trapping

Cao Han, Liu Yang, Wang Wending, Xu Guangzhi, Liang Renyou. AN ESR STUDY ON THE PHOTOCHEMICAL HYDROGEN ABSTRACTION BETWEEN N-BROMOSUCCINIMIDE AND ALCOHOL OR HYDROCARBON[J]. Chinese Journal of Magnetic Resonance, 1989, 6(1): 71-76.

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AN ESR STUDY ON THE PHOTOCHEMICAL HYDROGEN ABSTRACTION BETWEEN N-BROMOSUCCINIMIDE AND ALCOHOL OR HYDROCARBON

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