Connection between dielectric constant and total number of hydrogen-bond groups per cation-anion pair in ionic liquids was written by Shi, Baoli. And the article was included in Journal of Molecular Liquids in 2020.Application of 35487-17-3 This article mentions the following:
This paper reports a quant. connection between the dielec. constant and calculated total number of hydrogen-bond groups per cation-anion pair for 44 ionic liquids, including 15 ionic liquids with high dielec. constants exceeding 20. The total number of hydrogen-bond groups per cation-anion pair was equal to the addition of the hydrogen-bond group number per cation and per anion. The methylene group could reduce the group number capable of forming hydrogen bonds, and one methylene group caused a decrease of 1 hydrogen-bond number Regardless of whether a liquid was ionic or non-ionic liquid, approx. linear relationship were observed between dielec. constant and total hydrogen-bond number per mol. For ionic liquids, an increase of 1 in the total number of hydrogen-bond groups per cation-anion pair resulted in an increase of approx. 8.5 in the dielec. constant For non-ionic liquids, the value was approx. 21.9. The average molar d. of nine hydrogen-bonded ionic liquids with high dielec. constants was 9.3 x 103 mol/m3, while the average molar d. of eight non-ionic liquids with hydrogen-bonds was 21.1 x 103 mol/m3. The 21.1 M d. coefficient of the non-ionic liquids was almost equal to the 21.9 coefficient in the dielec. constant equation, and the 9.3 M d. coefficient of the ionic liquids was very close to the 8.5 coefficient in its dielec. constant equation. This result indicated that the effect mechanisms of the intermol. hydrogen-bond structure on dielec. constant were similar for the two types of liquids In the experiment, the researchers used many compounds, for example, 1-Methyl-1H-imidazol-3-ium chloride (cas: 35487-17-3Application of 35487-17-3).
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Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem