pi-pi interactions between pyrylium and phenyl rings in the crystal

被引:4
|
作者
Balaban, TS
Furmanova, NG
机构
[1] CD NENITZESCU INST ORGAN CHEM,BUCHAREST,ROMANIA
[2] RUSSIAN ACAD SCI,INST CRYSTALLOG,MOSCOW 117333,RUSSIA
来源
ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES | 1997年 / 52卷 / 04期
关键词
pyrylium salt; crystal engineering; charge transfer; crystal structure;
D O I
10.1515/znb-1997-0409
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The crystal structures of two isomeric phenyl-substituted pyrylium perchlorates, 2,6-dimethyl-4-phenylpyrylium (1) and 2,4-dimethyl-6-phenylpyrylium (2), have been determined. Both cations are planar in the crystal so that the electron deficient pyrylium rings can interact strongly with the phenyl rings of adjacent molecules forming stacks along the shortest crystallographic axis. The phenyl rings may act as donors in a charge transfer interaction which is more pronounced in 1 than in 2. Charge transfer appears as a non-mandatory consequence of the pi-pi stacking. The structures demonstrate the electrostatic nature of these interactions conforming to the model of Hunter and Sanders [1].
引用
收藏
页码:485 / 489
页数:5
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