ONE-BOND CC SPIN-SPIN COUPLING-CONSTANTS IN DERIVATIVES OF BENZENE - NONLINEARITY OF (1)J(CC) VS SUBSTITUENT ELECTRONEGATIVITY

被引：12
|
作者：
KAMIENSKATRELA, K
DABROWSKI, A
JANUSZEWSKI, H
机构：
[1] Institute of Organic Chemistry, Polish Academy of Sciences, Warsaw
来源：
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 1993年 / 49卷 / 11期
关键词：
D O I：
10.1016/0584-8539(93)80118-T
中图分类号：
O433 [光谱学];
学科分类号：
0703 ; 070302 ;
摘要：
A set of one-bond CC coupling constants has been determined for mono- and disubstituted benzenes. Large 1J(CC) values have been found within the benzene rings bearing highly electronegative substituents such as halogens, methoxy and nitro groups and small values for those with electropositive substituents. The total range of 1J(CC) couplings observed in our work is larger than 50 Hz. These large variations of CC spin-spin couplings are interpreted in terms of Fermi-contact contributions and the redistribution of s-electrons within a CC bond under influence of substituents. Contrary to some previous findings the data obtained in the present work indicate that the relationship between 1J(CC) and the substituent electronegativity is not linear.
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页码：1613 / 1619
页数：7
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