波谱学杂志 ›› 2006, Vol. 23 ›› Issue (2): 261-269.

• 4 • 上一篇    下一篇

离子性指数、立体效应参数与膦类化合物31P NMR δP的关系

  

  1. 山西大学 化学化工学院,山西 太原 030006
  • 收稿日期:2005-08-18 修回日期:2005-10-26 出版日期:2006-06-05 发布日期:2006-06-05
  • 基金资助:

    山西省自然科学基金项目(20041013)与山西省工业攻关基金项目(2006031204).

Calculating 31P Chemical Shifts of Phosphines Based on the Ionicity Index  and Stereoscopic Effect Index of the Compounds

  1. College of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China
  • Received:2005-08-18 Revised:2005-10-26 Online:2006-06-05 Published:2006-06-05
  • Supported by:

    山西省自然科学基金项目(20041013)与山西省工业攻关基金项目(2006031204).

摘要:

利用离子性指数(INI)和立体效应参数(αβγ)对100个膦化合物中磷原子进行结构表征,并与其核磁共振磷谱(31P NMR)建立了优良的定量构谱相关(QSSR)模型:δP=-163.695 3-1.003 1INI+34.632 7α+13.892 9β-3.331 7γ. 建模的计算值、留一法(Leave-One-Out, LOO)交互校验(Cross-Validation, CV)预测值的复相关系数(R)分别为0.976 5和0.973 9. 所建模型不仅在一定程度上阐明了膦类化合物31P NMR谱化学位移与其分子结构信息之间的关系,同时也提供了一种从理论上计算膦类化合物31P NMR谱化学位移的新方法,并对深入了解膦类化合物结构与性能的关系及解析、预测其31P NMR谱提供了一定的理论依据.

关键词: 31P NMR, 膦类化合物,  , 离子性指数,  立体效应参数

Abstract:

A model was proposed for calculating 31P chemical shifts of the phosphorus atoms in phosphine and its derivatives from the ionicity indices (INI) and the stereoscopic effect parameters (α, β, γ)of the compounds: δP=-163.695 3-1.003 1INI+34.632 7α+13.892 9β-3.331 7γ. Correlation coefficients of the proposed model and leave-one-out cross-validation were 0.976 5 and 0.973 9, respectively. This model not only provides a new method to calculate 31P chemical shifts of phosphines, but also establishes the relationship between the 31P chemical shifts of phosphines and their molecular structures. In addition, it can be used to predict the 31P chemical shifts of phosphine derivatives.

Key words: 31P NMR, phosphine,  ionicity index, stereoscopic effect parameter

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