The Influence of the Side Chain Length on -OCH3- Interactions Determining the Crystal Packing of Four Substituted 1,4-Bis(
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- 作者：Christophe M. L. Vande Velde ; Li-Juan Chen ; Jan K. Baeke ; Maarten Moens ; Pieter Dieltiens ; Herman J. Geise ; Matthias Zeller ; Allen D. Hunter ; and Frank Blockhuys
- 刊名：Crystal Growth & Design
- 出版年：2004
- 出版时间：July 2004
- 年：2004
- 卷：4
- 期：4
- 页码：823 - 830
- 全文大小：166K
- 年卷期：v.4,no.4(July 2004)
- ISSN：1528-7505
文摘
The crystal structures of E,E-1,4-bis[2-(2,4,6-trimethoxyphenyl)ethenyl]-2,5-dimethoxybenzene (1),E,E-1,4-bis[2-(2,4,6-trimethoxyphenyl)ethenyl]-2,5-diisopropoxybenzene (2), E,E-1,4-bis[2-(2,4,6-trimethoxyphenyl)ethenyl]-2,5-dihexoxybenzene (3), and E,E-1,4-bis[2-(2,4,6-trimethoxyphenyl)ethenyl]-2,5-bis(2-phenylethoxy)benzene(4) are reported. A weak intramolecular hydrogen bond between protons on the olefinic link and the ortho-methoxygroups on the adjacent benzene rings is commented on. In general, however, the crystal packing for these structuresis primarily determined by weak -OCH3-
interactions. Their numbers change with the structure and length ofthe side chains and with the accommodation of the extended chains in the lattice. A discussion on the effects ofthese interactions on the possibility of lattice formation explains why these four compounds crystallize and severalsimilar ones with different alkoxy side chains do not.
interactions. Their numbers change with the structure and length ofthe side chains and with the accommodation of the extended chains in the lattice. A discussion on the effects ofthese interactions on the possibility of lattice formation explains why these four compounds crystallize and severalsimilar ones with different alkoxy side chains do not.