高等学校化学学报 ›› 1997, Vol. 18 ›› Issue (4): 574.

• 研究简报 • 上一篇    下一篇

应用分子图形学、分子力学、量子化学及静电势研究农药分子结构与性能关系(X)──磺酰脲分子内旋转通道的分子力学研究

刘艾林1, 曹炜1, 赖城明1, 袁满雪1, 张金碚2, 林少凡2, 李正名3   

  1. 1. 南开大学元素有机化学国家重点实验室, 南开大学化学系, 天津, 300071;
    2. 南开大学中心实验室,天津,300071;
    3. 南开大学元素有机化学研究所, 天津, 300071
  • 收稿日期:1996-05-07 出版日期:1997-05-24 发布日期:1997-05-24
  • 通讯作者: 赖城明.
  • 作者简介:刘艾林, 女, 26岁, 硕士.
  • 基金资助:

    国家自然科学基金

Using Molecular Graphics, Molecular Mechanics, Quantum Chemistry and Electrostatic Potential Method to Study Structure-Property Relationship on Pesticides(X) ──Study on Internal Rotation Passage in Sulfonylurea Molecule by Molecular Mechanics Method

LIU Ai-Lin1, CAO Wei1, LAI Cheng-Ming1, YUAN Man-Xue1, ZHANG Jin-Pei2, LIN Shao-Fan2, LI Zheng-Ming3   

  1. 1. National Key Laboratory of Elemento-Organic Chemistry, Department of Chemistry, Nankai University, Tianjin, 300071;
    2. Central Lab, Nankai Univ, Tianjn;
    3. Elemento-Organic Chem. Institute, Nankai Univ., Tianjin
  • Received:1996-05-07 Online:1997-05-24 Published:1997-05-24

关键词: 内旋转通道, 磺酰脲分子, 分子力学

Abstract: In this paper, we have disussed the internal rotation in sulfonylurea molecules,which belong to high active and low toxic herbicides and take the form of conformational iso-mers in their crystal structures.In order to understand the formation of their enantimers, weobtained a series of data of molecular energy of different conformation by using the molecularmechanics method and the stepwise rotation single-bond method.We found out the lowestinternal rotation passage and obtained the energy barrier of hindered rotation which is less 60kJ/mol.This result shows that there is a lower energy passage to exchange the conforma-tional isomers of these molecules, so exchanging the different conformational isomers is notvery difficult.

Key words: Internal rotation passage, Sulfonylurea molecule, Molecular mechanics

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