Gleiter Rolf, Werz Daniel B, Rausch Bernhard J
Organisch-Chemisches Institut der Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany.
Chemistry. 2003 Jun 16;9(12):2676-83. doi: 10.1002/chem.200204684.
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 C(2) 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[bond]C) interactions.
结果表明，管状结构是在固态中通过紧密的硫族元素-硫族元素（X...X）接触形成的。作为例子，展示了各种含有硫和硒中心的环状体系。它们的共同之处在于相邻堆叠的硫族元素中心之间的紧密接触，形成了锯齿形或梯子型排列。对于环尺寸为24 - 33的环状体系，所得的管能够包含烃类作为客体分子。对于2,7 - 二碲代八 - 3,5 - 二炔（17），无环C(2)对称结构单元的碲中心之间的紧密接触产生了一种螺旋排列，其中包含正己烷。这种有利的X...X接触可追溯到np(X)-σ*(X[键]C)相互作用。
