The contribution of ring conformational flexibility to the relative stability of isomeric cyclohexadienes

被引:6
|
作者
Shishkin, OV
Leszczynski, J
机构
[1] Jackson State Univ, Dept Chem, Computat Ctr Mol Modeling Struct & Interact, Jackson, MS 39217 USA
[2] Natl Acad Sci Ukraine, Inst Single Crystals, UA-310001 Kharkov, Ukraine
关键词
D O I
10.1016/S0009-2614(99)00105-0
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 relative stability of isomeric cyclohexadienes was studied using density functional theory (B3LYP) and second-order Moller-Plesset perturbational method (MP2). It was demonstrated that higher conformational flexibility of dihydrocycles in 1,4-isomer results in additional stabilization of this molecules with respect to 1,3-cyclohexadiene. This fact is caused by the presence of low-frequency vibrations in 1,4-dihydrocycle which are populated at room temperature. (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:262 / 266
页数:5
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