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Indian Journal of Advances in Chemical Science Volume: 5,
Issue: 3, July 2017 |
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ISSN No.: 2320-0898 (Print);
2320-0928 (Electronic)
DOI:
10.22607/IJACS.2017.503008
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Research Article
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Investigation on Solvation
Behavior of an Ionic Liquid (1-butyl-3-methyl imidazolium Chloride)
with the Manifestation of Ion Association Prevailing in Different
Pure Solvent Systems |
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Siti Barman, Biswajit
Datta, Mahendra Nath Roy* |
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ABSTRACT |
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The ion-pair formation constant (KP) and
triple-ion formation constant (KT) of 1-butyl-3-methylimidazolium
chloride ([bmim][Cl]) have been determined conductometrically in
different solvent media in the temperature range from 298.15 to
318.15 K. The Fuoss conductance equation (1978) for ion-formation
and Fuoss–Kraus theory for triple-ion formations have been used for
analyzing the conductance data. The Walden product is obtained and
discussed. However, the deviation of the conductometric curves (Λ
vs. √m) from linearity for the electrolyte in tetrahydrofuran and
dichloromethane indicated/indicates triple-ion formation.
Ion-solvent interactions have been studied with the help of density,
viscosity, and Fourier transform infrared spectroscopic
measurements. Apparent molar volume and viscosity B-coefficient have
been calculated from experimental density and viscosity data,
respectively. The limiting ionic conductances (λo±
) have been estimated from the appropriate division of the limiting
molar conductance of tetrabutylammonium tetraphenylborate as
“reference electrolyte” method. |
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Key words: Ionic liquid, Ion-pair
and triple-ion formation, Ion-solvent interaction, Thermodynamic
parameters, Walden product. |
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[Download Full Article
PDF] |
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