Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

In?uence of the pressure, temperature, cation and anion on the volumetric properties of ionic liquids: New experimental values for two salts

Regueira, T.[Teresa], Lugo, L.[Luis], Fernandez, J.[Josefa]
J. Chem. Thermodyn. 2013, 58, 440-448
ABSTRACT
Experimental densities of two ionic liquids (ILs), 1-butyl-1-methylpyrrolidinium bis(tri?uoromethylsulfonyl)imide ([C4 C1Pyrr][NTf2]) and 1-(2-methoxyethyl)-1-methyl-pyrrolidinium tris(penta?uoroethyl)tri?uorophosphate ([C1 OC2 C1Pyrr][(C2F 5) 3PF3]), were measured over a broad temperature and pressure range, i.e. from (278.15 to 398.15) K and up to 120 MPa, respectively. The isobaric thermal expansion coef?cient of the two ILs was determined from these measurements ?nding a non-monotonous behaviour over the entire pressure range. The density values obtained were used to analyse the prediction ability of the methods proposed by Gardas and Coutinho and by Jacquemin et al. Furthermore, the in?uence of the cation and anion structure on the densities and the isothermal compressibilities was analyzed, also considering literature values.
Compounds
# Formula Name
1 C11H20F6N2O4S2 1-butyl-1-methylpyrrolidinium bis[(trifluoromethyl)sulfonyl]imide
2 C14H18F18NOP 1-(2-methoxyethyl)-1-methylpyrrolidinium tris(pentafluoroethyl)trifluorophosphate
Datasets
The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type Compound-# Property Variable Constraint Phase Method #Points
  • POMD
  • 1
  • Mass density, kg/m3 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Vibrating tube method
  • 63
  • POMD
  • 2
  • Mass density, kg/m3 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Vibrating tube method
  • 63