Solvent Effect on the Enthalpy of Solution and Partial Molar Volume of the Ionic Liquid 1-Butyl-3-methylimidazolium Tetrafluoroborate

Enthalpies of solution and partial molar volumes of the ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate were determined in 15 solvents of different polarity. Very large differences of the enthalpies of solution (ΔΔ sol H IL =38.9 kJ⋅mol −1 ) and partial molar volumes (Δ V IL =43 cm 3 ⋅mol...

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Bibliographic Details
Published in:Journal of solution chemistry 2012-09, Vol.41 (8), p.1375-1387
Main Authors: Kiselev, Vladimir D., Kashaeva, Helena A., Shakirova, Ilzida I., Potapova, Lubov’ N., Konovalov, Alexander I.
Format: Article
Language:English
Subjects:
Cations
Chemistry
Chemistry and Materials Science
Condensed Matter Physics
Enthalpy
Geochemistry
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Ionic liquids
Maleic anhydride
Molar volume
Oceanography
Physical Chemistry
Polarity
Solvent effect
Solvents
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Summary:Enthalpies of solution and partial molar volumes of the ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate were determined in 15 solvents of different polarity. Very large differences of the enthalpies of solution (ΔΔ sol H IL =38.9 kJ⋅mol −1 ) and partial molar volumes (Δ V IL =43 cm 3 ⋅mol −1 ) are nearly the same as observed for lithium perchlorate solutions. These results clearly indicate that the low values of the macroscopic polarity parameters of [bmim]BF 4 do not correspond with the large differences of the intermolecular interactions in IL solutions. The values of the partial molar volume of the cation, , were estimated for the first time. The changes of the partial molar volumes, V IL , reflect mainly the changes of anion volume, . The rate of the Diels–Alder reaction of 9,10-dimethylanthracene with maleic anhydride in the [bmim]BF 4 medium was nearly the same as in common molecular solvents.
ISSN:0095-9782
1572-8927
DOI:10.1007/s10953-012-9881-9