SOLVENT AND TEMPERATURE STUDIES OF SOME INDENYL-LITHIUMS AND FLUORENYL-LITHIUMS USING C-13 NMR-SPECTROSCOPY

被引：53

作者：

EDLUND, U

机构：

[1] Department of Organic Chemistry, Institute of Chemistry, Umeå University, Umeå

来源：

ORGANIC MAGNETIC RESONANCE | 1979年 / 12卷 / 12期

关键词：

D O I：

10.1002/mrc.1270121203

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

13C NMR spectra of indenyl‐ and fluorenyllithium and some of their methyl substituted derivatives have been obtained. The shielding differentials induced by varying the temperature or coordinating ability of the solvent are discussed in terms of an equilibrium between discrete ion pairs or differences in external solvation. An increase of the coordinating ability of the solvent induces shift differentials of similar signs as those given by lowering the temperature. Methyl substituents close to the cation location are found to have only a minor effect on the observed ion pair ratio but seem to influence the preferred cation position in the tight ion pair structure. Copyright © 1979 Heyden & Son Ltd.

引用

页码：661 / 666

页数：6

共 45 条

[41] C-13 NMR-SPECTROSCOPY OF CARBANION OF INDENE AS A FUNCTION OF TEMPERATURE AND COUNTERION [J].