From Single Molecule to Crystal: Mapping Out the Conformations of Tartaric Acids and Their Derivatives
作者:Agnieszka Janiak、Urszula Rychlewska、Marcin Kwit、Urszula Stępień、Krystyna Gawrońska、Jacek Gawroński
DOI:10.1002/cphc.201200033
日期:2012.4.23
Stereoisomers of one of the most important organic compounds, tartaric acid, optically active and meso as well as the ester or amide derivatives, can show diverse structures related to the rotation around the three carbon–carbon bonds. This study determines the controlling factors for conformational changes of these molecules in vacuo, in solution, and in the crystalline state using DFT calculations
最重要的有机化合物之一的酒石酸,酒石酸,旋光性和内消旋体的立体异构体以及酯或酰胺衍生物,可以显示出与围绕三个碳-碳键的旋转相关的各种结构。这项研究使用DFT计算,光谱测量和X射线衍射确定了这些分子在真空,溶液和结晶状态下构象变化的控制因素。从逻辑上讲,所有结构上的变化都可以通过羟基或酰胺供体与氧受体之间氢键形成和断裂的可能性来解释,其中最紧密的五元环氢键是最稳定的。这些发现可用于设计高极性,多官能手性化合物的分子和晶体结构。