N_2O_4-O_3硝化取代芳烃时取代基上的P轨道的邻位协助作用

P Orbital in Substituent Group Assists N_2O_4-O_3 Nitration Aromatics in Substituting Ortho

对N2 O4 O3 硝化取代芳烃进行广泛的研究 ,发现其产物的异构体分布与传统的混酸硝化产物的异构体分布有很大差别 ,并对造成这种差别的原因进行了分析。分析表明 ,取代基上的P轨道的邻位协助作用是主要因素 。

A comprehensive research has been conducted on the N 2 O 4 O 3 nitration aromatics reaction It is found that the isomer distribution of N 2 O 4 O 3 nitration substituted aromatic differs from that of mixed acid nitration substituted aromatic. The reasons for the difference have been analyzed. It comes that P orbital in substituent group can assist N 2 O 4 O 3 nitration aromatics in substituting ortho, which has been proved by the experimental results and the calculation results of the electron density distribution.