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本文根据~1H—NMR谱的化学位移与苯环电子云密度的关系,讨论了芳烃亲电子取代反应的定位效应问题,并用化学位移预测多取代芳烃的亲电
Based on the relationship between the chemical shifts of ~ 1H-NMR spectra and the electron cloud density of benzene rings, the localization effect of aromatic electrophilic substitution reactions was discussed. The chemical shifts were also used to predict the electrophilicity of substituted aromatic hydrocarbons