Substituent effects on ionisation and 13C NMR properties of some monosubstituted phenols -: A potentiometric, spectrophotometric and 13C NMR study

被引：19

作者：

Crisponi, G

Casu, M

Nurchi, VM

Cesare-Marincola, F

Pivetta, T

Silvagni, R

机构：

[1] Univ Cagliari, Dipartimento Chim Inorgan & Analit, I-09042 Cagliari, Italy

[2] Univ Cagliari, Dipartimento Sci Chim, I-09042 Cagliari, Italy

来源：

TALANTA | 2002年 / 56卷 / 03期

关键词：

potentiometry; UV-Vis spectroscopy; C-13 NMR chemical shift; ionisation constants; fibre optics; substituent effect; Swain-Lupton constants;

D O I：

10.1016/S0039-9140(01)00568-9

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The pK(a) values of ionisation of a set of phenols ortho, meta and para substituted are studied by spectrophotometry and C-13 NMR spectroscopy. A dual substituent analysis of equilibrium and NMR results, according to the Swain and Lupton procedure, is presented. The results of this analysis allow the assignment of the contribution of field and resonance contributions, both on equilibrium constants and chemical shifts. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：441 / 449

页数：9