ELECTRON RESONANCE STUDIES OF PERCHLORODIPHENYLMETHYL AND PERCHLOROTRIPHENYLMETHYL FREE RADICALS

被引：49
作者：
FALLE, HR
LUCKHURS.GR
HORSFIEL.A
BALLESTE.M
机构：
[1] Varian Research Laboratory, 8008 Zurich
[2] Varian Research Laboratory, Walton-on-Thames, Molesey Road
[3] Departamento de Qulmica Organica, Patronale Juan de la Ciena, The University, Barcelona
[4] Department of Chemistry, University of McGill, Montreal, Que.
[5] Department of Chemistry, The University, Southampton
来源：
JOURNAL OF CHEMICAL PHYSICS | 1969年 / 50卷 / 01期
关键词：
D O I：
10.1063/1.1670787
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：
The stable free radicals perchlorodiphenylmethyl, (C6Cl 5)2ĊCl, and perchlorotriphenylmethyl, (C 6Cl5)3C, have been examined by electron resonance. In solution, the isotropic α-chlorine hyperfine splitting in PDM was found to be 6.08 Me/sec. Splittings from 13C in natural abundance at the methyl carbon (about 100 Me/sec) and at additional phenyl-carbon sites were measured for both radicals. By incorporating PDM in the liquid crystal p-azoxyanisole, the principal values of the anisotropic hyperfine coupling tensor of the a chlorine were derived and found to be A 11= -9.2, A22= -18.9, and A33 = 47.2 Mc/sec. The variation with temperature of the degree of ordering of the radicals in the nematic mesophase was determined.
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页码：258 / &
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