Differential broadening between the signals split by the residual dipolar interaction with 14N in 13C CP/MAS NMR spectra of nitroanilines

被引：3
|
作者：
Hayashi, S [1 ]
机构：
[1] Natl Inst Mat & Chem Res, Tsukuba, Ibaraki 3058565, Japan
来源：
CHEMICAL PHYSICS LETTERS | 1999年 / 299卷 / 3-4期
关键词：
D O I：
10.1016/S0009-2614(98)01284-6
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The C-13 CP/MAS NMR spectra of various nitroanilines have been measured, and the origin of the differential broadening observed between the signals split by the residual dipolar interaction with N-14 has been clarified experimentally. The dipolar interaction between H-1 and N-14 is responsible for the C-13 differential broadening, while the direct dipolar interaction with H-1 is neglected. A molecular motion can eliminate the differential broadening, which is presumably the 180 degrees flip of the NH2 group around the C-N axis. Therefore, the differential broadening is highly correlated to the molecular motion and the hydrogen bonding. (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：272 / 276
页数：5
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