Indian Journal of Advances in Chemical Science Volume: 5, Issue: 3, July 2017

 
             
   
   

ISSN No.: 2320-0898 (Print); 2320-0928 (Electronic)

DOI:  10.22607/IJACS.2017.503008

 

   

Research Article

 

      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    
Siti Barman, Biswajit Datta, Mahendra Nath Roy*
ABSTRACT
 
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.
     
     

Key words: Ionic liquid, Ion-pair and triple-ion formation, Ion-solvent interaction, Thermodynamic parameters, Walden product.

 

 

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