A MULTINUCLEAR NMR-STUDY OF TAUTOMERIC EQUILIBRIA IN SOME IMINOPHOSPHINES

被引：0

作者：

DOMALEWSKI, W ^{[1
]}

SCHILF, W ^{[1
]}

STEFANIAK, L ^{[1
]}

WEBB, GA ^{[1
]}

机构：

[1] UNIV SURREY,DEPT CHEM,GUILDFORD GU2 5XH,SURREY,ENGLAND

来源：

BULLETIN OF THE POLISH ACADEMY OF SCIENCES-CHEMISTRY | 1991年 / 39卷 / 03期

关键词：

D O I：

暂无

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

P-31 NMR data are reported for three iminophosphines in CDCl3 and (CD3)2CO solutions at a variety of temperatures. Due to the thermal instability of the compounds studied, it was not possible to heat the samples sufficiently to obtain the coalescence point in the P-31 spectrum taken at 202.4 MHz. The A half-arrow-right-over-half-arrow-left B tautomeric equilibrium is found to be strongly dependent upon solvent, temperature and substituent. The thermodynamic parameter DELTA-H favours form B and DELTA-S favours form A. C-13 NMR data support the conclusions drawn from the P-31 measurements.

引用

页码：295 / &

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