ハロゲン化アリルに対する電子捕獲型検出器の応答と分子構造の関係

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書誌事項

タイトル別名
  • Correlation between electron capture response and chemical structure for aryl halides
  • ハロゲンカ アリル ニ タイスル デンシ ホカクガタ ケンシュツキ ノ オウト

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説明

Electron capture coefficients (K) for halobenzenes were calculated at various temperatures from data obtained by using electron capture techniques. The electron affinity(EA) of halobenzenes through a non-dissociative process and the activation energy(E) for a dissociative process were calculated from a plot of K vs. 1/T. The dissociative electron capture reaction for halobenzenes probably proceeds through anion radical intermidiates and the reaction mechanism is similar to the SN 2 displacement for aromatic compounds. In the cases of chlorinated benzonitriles and acetophenones, the electron affinity increases. The increase is probably due to the stabilization of the anion radical by the inductive effect of chlorine atom. The values of E for halobenzenes substituted with electron-accepting groups(cyano-, acetyl- and nitro-) were lower than for the non-substituted analogues. These groups appear to contribute to the resonance stabilization of the anion radical. An increase in the value of E for the methyl halobenzenes and a decrease in E for the chlorinated halobenzenes were observed.

収録刊行物

  • 分析化学

    分析化学 25 (11), 764-769, 1976

    公益社団法人 日本分析化学会

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