波谱学杂志 ›› 2008, Vol. 25 ›› Issue (3): 379-390.

• 研究论文 • 上一篇    下一篇

一种预测醇化学位移的新方法

聂长明1*; 姜赛红1; 林达1; 李忠海2; 武亚新1; 文松年1   

  1. (1. 南华大学 化学化工学院,湖南 衡阳 421001;2. 中南林学院 食品科学与工程学院, 湖南 长沙 410004)
  • 收稿日期:2007-11-12 修回日期:2008-01-24 出版日期:2008-09-05 发布日期:2009-12-05
  • 通讯作者: 聂长明

A New Method for Predicting 13C Chemical Shifts of Alcohols

NIE Chang-ming1*; JIANG Sai-hong1; LIN Da1; LI Zhong-hai2; WU Ya-xin1; WEN Song-nian1   

  1. (1. School of Chemistry and Chemical Engineering, Nanhua University, Hengyang 421001, China; 2. Faculty of Food Science and Engineering, Central South University of Forestry & Technology, Changsha 410004, China )
  • Received:2007-11-12 Revised:2008-01-24 Online:2008-09-05 Published:2009-12-05
  • Contact: NIE Chang-ming

摘要:

诱导效应是有机化学中最重要的效应之一,本文给出一套新的中性基团诱导效应参数(IG). 结合极化效应指数(PEI),以及αβγ结构参数,提出核磁共振“内屏蔽”和“外屏蔽”的概念及碳谱位移“内屏蔽”和“外屏蔽”模型,由此定量描述了饱和醇类化合物13C NMR化学位移:

CS=-2.3+[20.696 7(ΣΔI)+18.386 5(ΣΔPEI) -0.011 1(ΣΔI/ΣΔPEI)

+1.239 7ΣΔPEI/ΣΔI) -5.800 9NαC+4.260 4NβC-1.758 3-3.346 0NγC

+32.376 3].

相关系数R为0.994 7,LOO法交互检验系数RCV=0.992 7,模型具有优良的预测性和稳定性.

关键词: 13C NMR, 化学位移, 诱导效应, 极化效应, 醇类化合物

Abstract:

Inductive effect is one of the most important effects in organic chemistry. We propose a new inductive effect parameter for neutral groups (IG), which describes the “inner-shielding” and “outer-shielding” effects in NMR. It was shown that the 13C NMR chemical shifts (CS) of alcohols can be predicted from IG, polarization effect index (PEI) and α, β, γ structural parameters as follow:

CS=-2.3+[20.696 7(ΣΔI)+18.386 5(ΣΔPEI)-0.011 1(ΣΔI/ΣΔPEI)

+1.239 7(ΣΔPEI/ΣΔI)-5.800 9NαC+4.260 4NβC-1.758 3

-3.346 0NγC+32.376 3]. 
Experimental results showed that the above model had good stability and predictive ability. The correlation coefficient R of the equation was found to be 0.994 7, and the cross-validation correlation coefficient RCV by the LOO method was 0.992 7.

Key words: 13C NMR, chemical shift, inductive effect, polarization effect, alcohol

中图分类号: