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含羟基化合物的17O-NMR化学位移研究

李利东, 李临生*   

  1. 陕西科技大学应用化学研究所, 陕西咸阳 712081
  • 收稿日期:2001-11-05 修回日期:2002-01-03 出版日期:2002-06-05 发布日期:2002-06-05
  • 作者简介:李利东(1976-),男,内蒙古包头人,1998年 毕业于西北轻工业学院食品系,2002年获陕西科技大学化学工程系应用化学专业硕士学位,现为浙江大学材化学院高分子化学与物理专业博士研究生. *通讯联系人

STUDY OF 17O-NMR CHEMICAL SHIFTS OF HYDROXY-CONT AINED COMPOUNDS

LI Li-dong, LI Lin-sheng*   

  1. Research Center of Applied Chemistry,  University of Science and Technol ogy of Shanxi,  Xianyang 712081,  China
  • Received:2001-11-05 Revised:2002-01-03 Online:2002-06-05 Published:2002-06-05
  • About author:*Correspondence author

摘要:

在系统地归纳总结前人对含羟基化合物17O-NMR化学位移研究成果的基础上,按伯、仲、叔醇,i-R—OH型化合物(i-R表示与羟基直接相连的原子为非链状烷烃碳原子的取代基)及苯酚类等五大类,提出了计算含羟基化合物17O-NMR化学位移的公式:δcal0+aiΔδi,并通过 线性回归法结合最小二乘法得到15种计算醇和羧酸中羟基17O-NMR化学位移时采用的取代基参数和23种计算 酚羟基17O-NMR化学位移时采用的取代基参数,计算结果分别以伯、仲、叔醇、i-R—OH型化合物四类140种化合物和60种酚类在化合物为样本点作回归检验,置信度均为99.5% ,计算误差Δδ小于5(相对误差小于0.5%)的17O-NMR化学位移计算值均在90 %以上. 

关键词: 17O-NMR, 化学位移计算, 取代基效应, 回归分析, 羟基化合物

Abstract:

Based on systematical induction and summarization of data  o f 17O-NMR chemical shifts of hydroxy-contained compounds already reported,  the article provides the equation(1):  δcal=δ0n+Δα+Δβ+Δγ for primary, secondary, tertiary  alcohol and i-R—OH(em-R refers to substituents whose atom directly connected with hydroxy not telong ed to chain alkane) and equation(2):  δcal=δ0omp for substituted hydroxybenzenes. 15 substituent parameters for calculating the 17O-NMR chemical shifts of alcoho ls  and carboxylic acids and 23 substituent parameters for substituted hydroxybenze nes are gained with regression analysis in connection with least square. Equatio n(1) is checked regressively by the 17O-NMR chemical shifts of 140  compounds of primary, secondary,  tertiary alcohol and i-R—OH,  and equati on(2) is checked regressively by 17O-NMR chemical shifts of 60 compounds of  substituted hydroxybenzenes. Consequently,  their confidence limits both are 99. 5% and calculating errors(4δ) for over 90% compounds are less than (relatio nerrors 0.5%).

Key words: 17O-NMR, chemical shift, substituent ef fect, alcohol, hydroxybenzenes

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