H-1-NMR SPECTRA AND INTERNAL-ROTATION OF THE OH-GROUP IN 2,6-BIS-(DIETHYLAMINOMETHYL)-PHENOLS

被引：9

作者：

BRZEZINSKI, B

DENISOV, GS

GOLUBEV, NS

SMIRNOV, SN

机构：

[1] LENINGRAD STATE UNIV,INST PHYS,LENINGRAD 198904,USSR

[2] RES INST ANTIBIOT & ENZYMES,LENINGRAD 198020,USSR

来源：

JOURNAL OF MOLECULAR STRUCTURE | 1992年 / 267卷

关键词：

D O I：

10.1016/0022-2860(92)87060-9

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 NMR spectra (200 MHz) of solutions containing various 4-X-2,6-bis-(diethylaminomethyl)-phenols (X = OCH3, Cl, COOEt, NO2) have been obtained in the temperature range 150 - 250 K. The signals of 3,5-aromatic protons as well as those of 2,6-CH2-protons have been found to undergo doublet splitting due to slowing down internal rotation of the OH-group at 170 - 190 K. The frequency and activation energy values of the process have been determined by means of full line-shape analysis. The rotational barrier increases with strengthening of the intramolecular hydrogen bond, as indicated by the delta(OH) chemical shift.

引用

页码：383 / 388

页数：6

共 9 条

[1] COLLECTIVE PROTON MOTION AND PROTON POLARIZABILITY OF THE HYDROGEN-BONDED SYSTEM IN DISUBSTITUTED PROTONATED MANNICH-BASES [J].