Steric Control over Hydrogen Bonding in Crystalline Organic Solids: A Structural Study ofN,N?-Dialkylthioureas
作者:Radu Custelcean、Maryna G. Gorbunova、Peter V. Bonnesen
DOI:10.1002/chem.200400973
日期:2005.2.18
single-crystal X-ray diffraction, DFT calculations, and Cambridge Structural Database (CSD) analysis. A CSD survey indicated that unlike the related urea derivatives, which persistently self-assemble into one-dimensional hydrogen-bonded chains, the analogous thioureas can form two different hydrogen-bonding motifs in the solid state: chains, structurally similar with those found in ureas, and dimers, that further
借助单晶X射线衍射,DFT计算和剑桥结构数据库(CSD)分析,检查了晶体N,N'-二烷基硫脲中的氢键。一项CSD调查表明,与相关的尿素衍生物不断地自组装成一维氢键链不同,类似的硫脲可以在固态下形成两个不同的氢键基序:链,与尿素中的结构相似和二聚体,它们进一步缔合成氢键合层。一个或另一个基序的形成可以通过硫脲基团上有机取代基的庞大来控制,这提供了对晶体有机固体中氢键排列进行空间控制的明显例子。