期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 9, 期 12, 页码 2676-+出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.200204684
关键词
alkynes; chalcogens; host-guest systems; noncovalent interactions; self-assembly
It is shown that tubular structures arise in the solid state through close chalcogen-chalcogen (X...X) contacts. As examples a variety of cyclic systems containing sulfur and selenium centers is presented. Common to all of them are close contacts between the chalcogen centers of neighboring stacks giving rise to a zigzag or ladder-type arrangement. In the case of cyclic systems of ring size 24-33 the resulting tubes are able to include hydrocarbons as guest molecules. For 2,7-ditelluraocta-3.5-diyne (17) the close contacts between the tellurium centers of the acyclic G symmetric building blocks generate a helical arrangement in which n-hexane was included. The favored X...X contacts can be traced back to np(X)-sigma*(X-C) interactions.
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