At the molecular level, what type of interaction occurs in IL (ionic liquid) as 1-methylimidazole (between the electrostatic interaction of imidazole
ring or intramolecular interaction,Coulombic, van der Waals and hydrogen bonding ) in the absence totally of anion?
in terms of methylation status of the C2 position in 1-methylimidazole, what type of interaction occurs in obtained IL 1.2-dimethylimidazole?
Dear Haddad,
A study entitled "Structure-Property Relations in Ionic Liquids:
1,2,3-Trimethyl-imidazolium and 1,2,3-Trimethylbenzimidazolium
bis-(trifluorsulfonyl)imide " by Dzmitry H. Zaitsau et al. published in Z. Phys. Chem. 227 (2013) 205–215 in which vaporization enthalpies for a pairs of the ionic liquids (ILs) 1,2,3-trimethyl-imidazolium and 1,2,3-trimethyl-benzimidazolium bistrifluorsulfonylimide and the corresponding molecular liquids 1,2-dimethyl-imidazole and 1,2-dimethyl-benzimidazole were determined using a quartz crystal
microbalance method and TGA (for ILs) and the transpiration method (for molecular compounds) has revealed differences in vaporization enthalpies in molecular and ionic liquids and the lesson learned from this study – energetics of ionic
liquids is specifically different due to additional Coulomb interactions in contrast to
the molecular compounds. The differences seems to be not too large but significant.
It means that application of common structure-property methods (like additivity) to
ionic liquids should be done with cautions. These methods developed for molecular
compounds should be carefully adjusted for specific of ionic liquids.
For more on this investigation, please see the publication contained in the following link:
http://www.chemie1.uni-rostock.de/pci/emelyanenko/publications/95.pdf
Hoping this will be helpful,
Rafik
- Badges
- Science topic
- Similar topics
- Engineering
- Chemical Engineering