COTTON MOUTON EFFECT, MAGNETIC-ANISOTROPY AND CHARGE DELOCALIZATION OF 2,4,6-TRIS (DIMETHYLAMINO)-1,3,5-TRIAZINE - COMPARISON WITH 1,3,5-TRIAZINE

被引：6
|
作者：
BLANCH, EW [1 ]
DENNIS, GR [1 ]
RITCHIE, GLD [1 ]
WORMELL, P [1 ]
机构：
[1] UNIV NEW ENGLAND,DEPT CHEM,ARMIDALE,NSW 2351,AUSTRALIA
来源：
JOURNAL OF MOLECULAR STRUCTURE | 1991年 / 248卷 / 1-2期
关键词：
D O I：
10.1016/0022-2860(91)85014-T
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：
Measurements of the dilute-solution Kerr and Cotton-Mouton constants of 1,3,5-triazine and 2,4,6-tris (dimethylamino)-1,3,5-triazine (hexamethylmelamine) as solutes in cyclohexane are reported and analysed to obtain experimental values of the optical-frequency polarizability anisotropies and the magnetic anisotropies of these molecules. The magnetic anisotropies are separated into diamagnetic and temperature-independent paramagnetic contributions, and the role of the quadrupole moment in relation to previously reported stereospecific interactions between hexamethylmelamine and hexafluorobenzene is discussed. From a comparison of the derived out-of-plane magnetizability components with the values predicted for hypothetical structures in which the electron distribution is completely localized, it is inferred that 1,3,5-triazine exhibits only about one-tenth but 2,4,6-tris(dimethylamino)-1,3,5-triazine at least one-half of the delocalization that characterizes benzene.
引用
收藏
页码：201 / 209
页数：9
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