Internal rotation of the OH group in di-anils of 2-hydroxy-5-methyl-isophthaldehyde

被引：15

作者：

Dziembowska, T

Rozwadowski, Z

Sitkowski, J

Stefaniak, L

Brzezinski, B

机构：

[1] ADAM MICKIEWICZ UNIV POZNAN,DEPT ORGAN CHEM,PL-68700 POZNAN,POLAND

[2] TECH UNIV SZCZECIN,INST CHEM,PL-71065 SZCZECIN,POLAND

[3] POLISH ACAD SCI,INST ORGAN CHEM,PL-01224 WARSAW,POLAND

来源：

JOURNAL OF MOLECULAR STRUCTURE | 1997年 / 407卷 / 2-3期

关键词：

H-1; C-13; and; (NNMR)-N-15; spectroscopy; internal rotation; Schiff bases;

D O I：

10.1016/S0022-2860(97)00008-2

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：

H-1, C-13 and N-15 NMR spectra of di-R-anils of 2-hydroxy-5-methyl-isophthaldehyde (R=H, CH3, OCH3) were recorded in CDCl3 solution and the spectral assignments were performed. The variable temperature measurements over the range 310-223 K show evidence of a slowing down of the internal rotation of the OH group in comparison with the rotation of the free OH group in phenols. The kinetic parameters of the OH group rotation in the di-anils were determined by means of 1H NMR lineshape analysis. The conformational changes in molecules are discussed. (C) 1997 Elsevier Science B.V.

引用

页码：131 / 137

页数：7

共 22 条

[1] MULTIPLE SUBSTITUENT EFFECTS ON C-13 CHEMICAL-SHIFTS OF N-BENZYLIDENEANILINES - EVIDENCE FOR SUBSTITUENT-SUBSTITUENT INTERACTIONS AND THEIR IMPLICATIONS OF CONFORMATIONAL-CHANGES WITH SUBSTITUENTS [J].