NATURAL ABUNDANCE O-17 NMR-STUDIES ON METHYL N-ARYLCARBAMATES - TORSION ANGLE AND ELECTRONIC EFFECTS

被引：3

作者：

BOYKIN, DW

机构：

[1] Department of Chemistry, Georgia State University, Atlanta

来源：

SPECTROSCOPY LETTERS | 1992年 / 25卷 / 08期

基金：

美国国家科学基金会;

关键词：

O-17 NMR SPECTROSCOPY; N-ARYLCARBAMATES; TORSION ANGLES; ELECTRONIC EFFECTS;

D O I：

10.1080/00387019208017858

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

Natural abundance O-17 NMR data for 14 substituted methyl N-arylcarbamates obtained in acetonitrile solution at 75-degrees-C are reported. The O-17 NMR chemical shifts of hindered ortho N-arylcarbamates are shielded relative to unhindered ones; a quantitative relationship is observed between the carbonyl O-17 NMR chemical shifts and molecular mechanics (MM2) predicted torsion angles. The carbonyl O-17 NMR chemical shifts of meta and para substituted N-arylcarbamates am correlated with Hammett sigma constants.

引用

页码：1199 / 1205

页数：7

共 13 条

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