期刊
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
卷 2009, 期 14, 页码 2267-2274出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejoc.200900106
关键词
Supramolecular chemistry; Cyclophanes; Alkynes; Selenium; Diselenaalkynes; van der Waals contacts
资金
- Deutsche Forschungsgemeinschaft (DFG) [GK850]
The ortho, meta, and para isomers 4-6 of [6.6]cyclophanes with 2,5-diselenahex-3-yne bridges were synthesized by reacting the his (selenocyanatomethyl) benzene derivatives 8a-8c with the lithium salt of trimethylsilylethyne to yield 9a-9c, deprotection of which afforded the bis(ethynylselenylmethyl)benzenes 10a-10c. The condensation of the bis-lithium salts of 10a-10c with 8a-8c yielded the target compounds 4-6. X-ray investigations on single crystals of 4-6 revealed intermolecular Se center dot center dot center dot Se interactions which contribute significantly to the solid-state structures of these species, In the case of the orthocyclophane 4, we found short distances be-tween one Se-C C-Se unit of each molecule leading to a linear chain of orthocyclophane rings. In the metacyclophane, 5, the rings adopt a chair conformation and are piled on top of each other. The resulting molecular channels are connected with each other by intermolecular Se center dot center dot center dot Se interactions. For 6 also a chair conformation of the [6.6]paracyclophane unit was encountered. In the solid state the rings of 6 are connected by intermolecular Se center dot center dot center dot Se bridges. ((c) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据