波谱学杂志 ›› 1989, Vol. 6 ›› Issue (1): 41-46.

• 研究论文 • 上一篇    下一篇

拟除虫菊酯类农药的NMR研究——Ⅱ.拟除虫菊酯类中酯键部分构象的NMR研究

焦钉, 沈其丰   

  1. 北京农业大学
  • 收稿日期:1987-10-16 修回日期:1987-12-16 出版日期:1989-03-05 发布日期:2018-01-22
  • 基金资助:
    中国科学院自然科学基金资助

NMR STUDIES ON SYNTHETIC PYRETHROID PESTICIDES Ⅱ NMR STUDIES OF ESTER CONFORMATION OF PYRETHROIDS BY ASIS EFFECT

Jiao Ding, Shen Qifeng   

  1. Beijing Agricultural University
  • Received:1987-10-16 Revised:1987-12-16 Online:1989-03-05 Published:2018-01-22

摘要: 利用1H-NMR中羰基的ASIS值在羰基周围不同的区域符号分布的经验规律,研究了一系列拟除虫菊酯化合物羰基酯键部分的构象,指出在具有α-氰基的菊酯分子中,其溶液态构象是α-氰基与酯羰基共平面的构象,而在个有α-甲基的菊酯分子中,溶液态构象是α-氢原子与酯羰基共平面的构象.本实验结果支持了Hopfinger等人用分子力学方法计算的结果,从而肯定了氰基取代的菊酯分子在溶液态下的构象与在晶体中构象的不同.

关键词: ASIS, 溶液态构象, 拟除虫菊酯

Abstract: The ester conformation of some synthetic pyrethroids were studied by 1H-NMR with the rule of ASIS effect of carbonyl group, We found, if pyrethroid molecule had α-CN group, the α-CN and ester C=0 were coplanar:if it had α-CH3, the α-H and ester C=0 were coplanar. Our experiments supported Hopfinger's results from calculation with molecular dynamics. Therefore, We confirmed tha the conformations of α-CN pyrethroidsin solution and orystal were different.

Key words: ASIS, Comformaticn in solution, Pyrethroids