波谱学杂志 ›› 1986, Vol. 3 ›› Issue (4): 315-320.

• 研究论文 •    下一篇

1H-NMR-Eu (fod)3位移谱研究3-(2,2,2-三氯乙烯基)-2,2-二甲基环丙烷羧酸甲酯的立体构型

王作琴, 杨世宗, 李文   

  1. 沈阳化工研究院
  • 收稿日期:1986-01-09 修回日期:1986-04-05 出版日期:1986-12-05 发布日期:2018-01-23

DETERMINATION OF THE STEREOCONFIGURATION OF 3-(2,2,2-TRICHLOROETHYL)-2,2-DIMETHYLCYCLOPROPANE CARBOXYLATE BY 1H NMR-Eu(FOD)3-SHIFTED SPECTRA

Wang Zuoqin, Yung Shizong, Li Wen   

  1. Shenyang Research Institute of Chemical Industry
  • Received:1986-01-09 Revised:1986-04-05 Online:1986-12-05 Published:2018-01-23

摘要: 本文用1H-NMR-Eu (fod)3位移谱鉴定了(1RS)-3-(2,2,2-三氯乙烷基)-2,2-二甲基环丙烷羧酸甲酯的顺、反异构体,测出其三元碳环质子的耦合常数3J=5.5Hz (顺式)、4Hz (反式),并以此确定构型。根据质子极限位移的测定值与假接触位移公式,求出两种配位物合理的配位参数,并由此计算出其顺、反异构体的羰基与Eu(fod)3配位能力的比值。

Abstract: The cis, trans(lRS)-3-(2,2, 2-trichloroethyl)-2,2-dimethylcyclopropane earboxylate have been identified by 1H-NMR obtained in the presence nf LSR Eu(fod)3. The stereoconf iguration of substituted cyclopropane have been deiermined with coupling constants 3J=5.5Hz (cis) and 4Hz(trans). The observed limiting shifts and MoConell-Robertson equation have been used to determine resoaable molecular geometry parameters of the complex, from which the ratio of pssudocontact constants of the carbonyl groups in the two isomers have been calculated.