有机化学 ›› 1992, Vol. 12 ›› Issue (5): 482-487. 上一篇    下一篇

研究论文

二烷基苯基磷(膦)酸酯重排和水解反应的结构效应

李树森;王国权   

  1. 中国科学院上海有机化学研究所;中国科学院计算机化学开放实验室
  • 发布日期:1992-10-25

The structure effects on Scp^2-O-P rearrangement reactions and alkaline -hydrolysis reactions for phosphinates,phosphonates and phosphates

LI SHUSEN;WANG GUOQUAN   

  • Published:1992-10-25

本文用分子力学(MM)和量子化学(MNDO)方法研究了各种不同磷(膦)酸酯的Csp^2-O-P重排反主尖和碱性水解反应的结构效反应.计算结果表明,随着底物分子中C-P键数目的增多,发生重排反主尖的活化能也增加,这与实验结果完全一致.但由于计算得到的各类磷(膦)酸酯碱性水解反应的活化能同实验结果相矛盾,这可能是由于底物同过渡态之间溶剂化能的差别所致.

关键词: 量子化学, 分子力学, 膦酸酯类, 重排反应, 水解反应, 结构效应

The structure effects on the rearrangement and alkaline hydrolysis reactions for title compounds I (R1, R2 = MeO, MeO; MeO, Et; Et, Et) are investigated by MM and MNDO methods. The results indicate that the activation energies of the rearrangement reactions increase with the increasing no. of the C-P bonds in the substrates, that is consistant with the experimental results. On the contrary the activation energies for the alkaline hydrolysis reaction are opposite to the experimental results, which can be explained by the difference of the solvent effects between the substrates and the transition states.

Key words: PHOSPHONIC ACID ESTER, QUANTUM CHEMISTRY, MOLECULAR MECHANICS, REARRANGEMENT REACTION, HYROLYSIS, STRUCTURAL EFFECT

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