Synthese und Kristallstrukturbestimmung von Additionsverbindungen aus Alkyldimethylbromsilanen und N-Trimethylsilylimidazol/Syntheses and Crystal Structure Determination of Addition Compounds of Alkyldimethylbromosilanes and N-Trimethylsilylimidazole
Easily Vaporizable Ionic Liquids – No Contradiction!
作者:Martin Köckerling、Tim Peppel、Philipp Thiele、Sergey P. Verevkin、Vladimir N. Emel'yanenko、Artemiy A. Samarov、Wolfgang Ruth
DOI:10.1002/ejic.201500391
日期:2015.8
It was a big surprise to see crystals of an ionicliquid (IL) forming by sublimation at room temperature. ILs are generally accepted to have negligible vapour pressures at elevated temperatures, making their sublimation or distillation very difficult. ILs that sublime easily contain silylimidazolium-based cations. In order to establish the details of the unusual behaviour of this subclass of ILs, a
看到在室温下通过升华形成离子液体 (IL) 的晶体是一个很大的惊喜。通常认为 IL 在升高的温度下具有可忽略不计的蒸气压,这使得它们的升华或蒸馏非常困难。容易升华的离子液体含有基于甲硅烷基咪唑鎓的阳离子。为了确定该 IL 亚类的异常行为的细节,进行了光谱、X 射线晶体学、物理化学和理论表征的组合。将结果与其他易于蒸发的化合物(如氯化铵和萘)的结果进行比较。其中一种化合物 N-甲基-N'-二甲基(苯基)甲硅烷基咪唑鎓氯化物(单斜晶系,C2/c)的单晶 X 射线结构分析清楚地显示了分离离子的存在,
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