硝基芴酮与脂肪胺的光化夺氢反应的ESR研究

AN ESR STUDY FOR THE PHOTOCHEMICAL HYDROGEN-ABSTRACTION REACTION OF FATTY AMINES WITH NITROFLUORENONES

本文用自旋捕捉技术与ESR方法研究了五种硝基芴酮与五种不同的伯、仲、叔脂肪胺的光化夺氢反应中的活泼自由基。结果表明,当胺中有N上氢和α—C上氢时,优先形成N—中心自由基:仅当无N上氢时,才形成C—中心自由基。

The active radicals produced in the photochemical hydrogen-abstraction reaction between five Tatty amines and five nitrofluorenones have been studied by means of spin trapping -ESR technique . The results show that the njtro-gen - centered free radicals arc formed in a first priority when there are N- H atoms and α-C -H atoms in amines, and the Carbon -centered free radical is founed only when there is no hydrogen linked to the nitrogen atom (N-H ) in amine , as in the case of ceaction for the teitiary amines .