ABSTRACT
The intermolecular interactions in ILs are of great importance for their general use, and the basic knowledge in the physical chemistry of these solvent systems is under intensive growth. The number of publications is rising steeply and it is dif cult to get an overview. Early studies probed the nature of interactions in so-called rst-generation chloroaluminate ionic liquids [2], and now also information becomes available for second generation, air-stable systems. Many IL studies have covered theoretical aspects [3-7] and x-ray crystallography of the frozen melts [8-12], and solubilities of gases in ILs [13-15].
