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本文用自由基捕捉剂2,3,5,6-四甲基亚硝基苯(ND)及苯亚甲基叔丁基氮氧化物(PBN)与ESR相结合的方法研究了十二种取代酰胺RC_6H_4NHC(0)CH_3(R-CH_3、Cl、Br、H、NO_2)、C_6H_5N(R)C(0)CH_3(R=CH_3、C_2H_5)及HC(0)NR_(R—CH_3、C_2H_5)与二苯酮光化夺氢反应中的活泼自由基。结果表明:1.对于RC_6H_4NHC(0)CH_3,二苯酮夺取氮上H形成R-C_6H_4NC(0)CH_3自由基。2.对C_6H_5N(R)C(0)CH_3及HC(O)NR_2,二苯酮夺取与羰基相连的甲基氢、羰基上氢及与N相连碳上的氢分别形成
In this paper, twelve kinds of substitutions were studied by combining free radical scavenger 2,3,5,6-tetramethylnitrosobenzene (ND) and benzylidene tert-butyl oxynitride (PBN) with ESR (R_CH_3, C_2H_5) and HC (0) NR_ (R_CH_3, C_2H_5) with the corresponding compounds of the formula: RC_6H_4NHC (0) CH_3 Active Radicals in the Photochemical Hydrogen Abstraction of Benzophenone. The results showed that: 1. For RC_6H_4NHC (0) CH_3, benzophenone sequestered H to form R-C_6H_4NC (0) CH_3 free radicals on nitrogen. 2. For C_6H_5N (R) C (0) CH_3 and HC (O) NR_2, benzophenone captures the methyl hydrogen, the hydrogen on the carbonyl and the hydrogen on carbon linked to N, respectively