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烷基极化效应与羰基13C化学位移

乔洁,李美萍,芦飞,张生万*   

  1. 山西大学化学化工学院,太原  030006
  • 收稿日期:2002-03-12 修回日期:2002-04-28 出版日期:2002-12-05 发布日期:2002-12-05
  • 作者简介:乔洁(1972-),女,山西太原人,硕士,讲师,现在山西医科大学化学教研室工作,主要从事分析化学研究
  • 基金资助:

    山西省自然科学基金资助项目(20001011).

POLARIZABILITY EFFECT OF ALKYL GROUP ON 13C CHEMICAL SHIFT OF C=O

QIAO Jie,  LI Mei-ping,  LU Fei, ZHANG Sheng-wan*   

  1. College of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 0300 06, China
  • Received:2002-03-12 Revised:2002-04-28 Online:2002-12-05 Published:2002-12-05
  • Supported by:

    山西省自然科学基金资助项目(20001011).

摘要:

对羰基化合物中羰基碳的13C NMR化学位移与烷基(R)极化效应的内在关系 进行了研究. 结果表明:分子中R的极化效应增加使羰基碳的13C化学位移值升 高,其关系可表示为δ=a+b·ΣPEI(R),其中a、b为系数,PEIR)为R极化效应指数.
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关键词: 极化效应, 羰基化合物, 13C NMR化学位移, 烷基极化效应指数, 烷基

Abstract:

The relation between the 13C chemical shift of C=O in alkyl substitute d compound RXC=O and the polarizability effect index (PEI) of alkyl group R can  be expressed as
δ=a+b·ΣPEI(R)
where a and b are empirical constants. Regression analysis showed that the equat ion is a good expression for the 13C chemical shift of C=O change rule  with the  polarizabality effect index of alkyl group. The results also showed that the pol arizability effect index of alkyl group R increase the 13C chemical sh ift of C=O.

Key words: carbonyl compound, 13C chemical shift, polarizability effect, alkyl group

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