Faculty of Chemistry, University of Opole, Oleska 48, 45-052 Opole, Poland.
Chem Commun (Camb). 2011 Aug 21;47(31):8769-71. doi: 10.1039/c1cc10689a. Epub 2011 May 26.
Directional Cl···Cl type I and II interactions govern the low-density aggregation of 1,1,2,2-tetrachloroethane molecules in synclinal conformation in the crystalline state at low temperature, whereas the dense molecular packing in high-pressure is achieved for the antiperiplanar conformers and electrostatically less favored Cl···Cl contacts. The mechanism of transformation between loose and dense associations involves the collapse of Cl···Cl contacts and conformational conversion.
低温下，顺式构象的 1,1,2,2-四氯乙烷分子通过 Cl···Cl I 型和 II 型的定向相互作用发生低浓度聚集，而在高压下，反式构象有利于形成密集的分子堆积，静电相互作用较弱的 Cl···Cl 接触也有助于实现这一过程。在疏松和密集聚集之间的转变机制涉及 Cl···Cl 接触的崩溃和构象转换。
