STUDIES OF CHEMICAL-SHIFT ANISOTROPY IN LIQUID-CRYSTAL SOLVENTS .I. EXPERIMENTAL RESULTS FOR METHYL HALIDES

被引：24

作者：

CEASAR, GP

YANNOI, CS

DAILEY, BP

机构：

[1] Department of Chemistry, Columbia University, New York

[2] Department of Chemistry, California Institute of Technology, Pasadena, CA

[3] IBM Watson Research Center, York town Heights, NY 10598

来源：

JOURNAL OF CHEMICAL PHYSICS | 1969年 / 50卷 / 01期

关键词：

D O I：

10.1063/1.1670806

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：

Analysis of the nuclear magnetic resonances of the methyl halides dissolved in nematic-liquid-crystal solutions has given measurements of the anisotropy of the proton chemical shift. The accurate determination of these anisotropies is made difficult by the effect of the liquid-crystal solvent on the chemical-shift measurements. The method was found to be unsuitable for the measurement of the methyl fluoride anisotropy, but the values for the other methyl halides have been determined to within ±1.5 ppm. Methyl chloride and methyl bromide are found to have small proton chemical-shift anisotropies indistinguishable from zero, and methyl iodide appears to have a small positive anisotropy.

引用

页码：373 / &

共 25 条

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