Characterization of 2-aryl-1,3,4-oxadiazoles by 15N and 13C NMR spectroscopy

被引：12
|
作者：
Nowak-Wydra, B [1 ]
Gierczyk, B [1 ]
Schroeder, G [1 ]
机构：
[1] Adam Mickiewicz Univ Poznan, Fac Chem, PL-60780 Poznan, Poland
来源：
MAGNETIC RESONANCE IN CHEMISTRY | 2003年 / 41卷 / 09期
关键词：
NMR; N-15; C-13; chemical shifts; Hammett correlations; 1,3,4-oxadiazole;
D O I：
10.1002/mrc.1231
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
N-15 NMR chemical shifts of 2-aryl-1,3,4-oxadiazoles were assigned on the basis of the H-1-N-15 HMBC experiment. Chemical shifts of the nitrogen and carbon atoms in the oxadiazole ring correlate with the Hammett sigma-constants of substituents in the aryl ring (r(2)greater than or equal to0.966 for N atoms). N-15 NMR data are a suitable and sensitive means for characterizing long-range electronic substituent effects. Additionally, C-13 NMR data for these compounds are presented. Copyright (C) 2003 John Wiley Sons, Ltd.
引用
收藏
页码：689 / 692
页数：4
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