波谱学杂志 ›› 2005, Vol. 22 ›› Issue (2): 173-179.

• 研究论文 • 上一篇    下一篇

离子性指数、极化效应指数与醇13C NMR δC的关系

  

  1. 1.山西大学 化学化工学院, 山西 太原 030006; 2.南京大学 物理系,江苏 南京 210089
  • 收稿日期:2004-09-27 修回日期:2005-03-03 出版日期:2005-06-05 发布日期:2005-06-05
  • 基金资助:

    山西省自然科学基金(20041013)及山西省科技攻关课题(021171)资助项目.

Relationship between Ionicity and Polarizability Effect Indices of Alcoholic Compounds and Their 13C NMR Chemical Shifts

  1. 1.College of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006,China;
    2.Physics Department of Nanjing University, Nanjing, 210089, China
  • Received:2004-09-27 Revised:2005-03-03 Online:2005-06-05 Published:2005-06-05
  • Supported by:

    山西省自然科学基金(20041013)及山西省科技攻关课题(021171)资助项目.

摘要:

通过对64个饱和醇类化合物中348个碳原子的13C NMR谱化学位移与其部分结构参数关系的研究,发现各个碳原子的13C NMR谱化学位移与离子性指数(INI)、极化效应指数(PEI)以及结构信息参数[NiH(i=α、β、γ)和γOH]的关系可表示为:  
δC=[-2.3-0.8577(INI)+10.623 3(∑PEI)+0.563 0(INI/∑PEI) -0.420 8(∑PEI/INI)

           +0.197 9 NαH-7.462 5 NβH+24.446 7NγH+0.256 3 γOH]×(-53.169)(相关系数R=0.991 4)     
        此式不仅在一定程度上阐明了醇13C NMR谱化学位移与其分子结构信息之间的关系,同时也提供了一种计算醇分子13C NMR谱化学位移的新方法,并对解析及预测其13C NMR谱提供了理论依据.

关键词: 13C NMR谱化学位移, 醇类化合物, 离子性指数, 极化效应指数, 结构信息参数

Abstract:

This study measured 13C NMR chemical shifts of 348 carbon atoms in 64 alcoholic compounds, and studied their relationship with the atomic ionicity index, the polarizability effect index and the structural information parameters NiH(i=α、β、γ) and γOH of the compounds. The results indicated that the 13C NMR chemical shifts of alcoholic compounds can be described by following equation: 
         δC=[-2.3-0.8577(INI)+10.623 3(∑PEI)+0.563 0(INI/∑PEI) -0.420 8(∑PEI/INI)

                +0.197 9 NαH-7.462 5 NβH+24.446 7NγH+0.256 3 γOH]×(-53.169)

which provides a new method for calculating 13C NMR chemical shifts of alcoholic compounds.

Key words: 13C NMR chemical shift, alcoholic compounds, ionicity index, polarizability effect index, structure information parameter

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