多硝基多甲基取代苯的核磁共振氢谱及质谱研究  

Hydrogen-Nuclear Magnetic Resonance and Mass Spectra of the Polynitro-Benzenes

作　　者：刘艳红[1] 张同来[1] 杨利[1] 张建国[1] 乔小晶[1] 郭金玉[1] 

机构地区：[1]北京理工大学爆炸科学与技术国家重点实验室,北京100081

出　　处：《分析化学》2007年第2期301-303,共3页Chinese Journal of Analytical Chemistry

基　　金：国家自然基金(No.20471008);北京理工大学基础研究基金(No.BIT-UBF-200302B01&BIT-UBF-200502B4221)资助

摘　　要：报道了4个多硝基取代苯的核磁共振氢谱及电子轰击质谱,结果表明,苯环上的氢由于受硝基的强吸电子诱导效应的影响,其质子化学位移出现于低场,同时苯环的甲基取代基也因受到负电性的影响,其化学位移值变大。在TPX、DPX、TMX、TNTM的EIMS中,消去OH基的‘邻位效应’和C—NO2键的裂分及出现相同的最终裂解碎片是此类化合物的质谱特征。The ^1H NMR and EI mass spectra of four polynitro-benzenes were discussed. In ^1H NMR the hydrogen in benzene cycle gives a proton peaks at low field due to the effect of the nitro groups. The proton peaks of CH3 are larger than the normal. Trinitro-p-xylene, dinitro-p-xylene, trinitro-m-xylene and trinitrotri- methylbenzene were recorded by the electron impact source. The fragmentation pathways of these compounds were studied. In these compounds with adjacent CH3 and NO2 groups, important fragmentation sequences are Ortho effect＇. Also the cleavage of C--NO2 bonds and the remainders contain the same ions are major mass spectrometric characters. These indicate the nitro groups are unstable.

关 键 词：多硝基取代苯 核磁 质谱 

分 类 号：O657.63[理学—分析化学]