C-13 AND RELATED NMR CHEMICAL-SHIFTS IN ALKYLAMMONIUM AND ALKYLPHOSPHONIUM SALTS

被引：13

作者：

EVANS, DJ

LEIGH, GJ

MACDONALD, CJ

机构：

[1] Afrc Institute of Plant Science Research, Nitrogen Fixation Laboratory, University of Sussex, Brighton

来源：

MAGNETIC RESONANCE IN CHEMISTRY | 1990年 / 28卷 / 08期

关键词：

Alkylammonium salts; Alkylphosphonium salts; Iron‐sulphur cluster;

D O I：

10.1002/mrc.1260280810

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The 13C NMR chemical shifts of the α‐carbon atoms in cations [NR4]+, [NR3CH2Ph]+ and [PR4]+ [R = Me, Et, Prn, Bun or Pen (n‐pentyl)] are found at anomalously high field in comparison with the corresponding shifts in RCl or RNH2. This is ascribed in part to the effect of the positive charge. The effect is detectable but less pronounced with β‐carbon atoms, but is not detectable in subsequent carbon atoms in longer alkyl chains. Copyright © 1990 John Wiley & Sons, Ltd.

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页码：711 / 714

页数：4

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