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有机化学
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有机化学 ›› 1995, Vol. 15 ›› Issue (5): 475-480. 上一篇    下一篇

研究论文

以σ～△～E^H^O度量取代基电子效应强度的定量判据

周文富   

  1. 三明高等师范专科学校
  • 发布日期:1995-10-25

σ～△～E^H^O as a quantitative critertion of the measurement of the electronic effect of substituents

ZHOU WENFU   

  • Published:1995-10-25

本文计算的σ～△～E^H^O和σ△E^L^U值, 应用于苯系Ph(X)n六十多个分子的亲电或亲核反应活性比较, 结果同文献实验数据。σ～△～E^H^O值与分子间或分子内亲电反应活性呈正平行关系, 而σ～△～E^L^U值则正好相反, 但是CN、CF3和F取代基则例外。

关键词: 亲电反应, 反应性, 苯 P, 取代基效应, 电子效应, 亲核反应

Comparison of the calculated σ～△～E^H^O or σ～△～E^L^U values with the electrophilic or nucleophilic reactivities at benzene ring of more than sixty Ph(X)n molecules taken from the experimental data found in literature has been carried out. The σ～△～E^H^O value accupately be positively parallel to the intramolecular and intermolecular electrophilic reactivity and vice versa for the σE^L^U value, while the cases of CN, CF3 and F groups are exceptional.

Key words: REACTIVITY, BENZENE P, ELECTROPHILIC REACTION, SUBSTITUENT EFFECT, ELECTRONIC EFFECT, NUCLEOPHILIC REACTION

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