Thermodynamics Research Center / ThermoML | Thermochimica Acta

Thermodynamic properties of 1-butyl-3-methylimidazolium trifluoromethanesulfonate ionic liquid in the condensed state

Paulechka, Y. U.[Yauheni U.], Kohut, S. V.[Sviataslau V.], Blokhin, A. V.[Andrey V.], Kabo, G. J.[Gennady J.]
Thermochim. Acta 2010, 511, 1-2, 119-123
ABSTRACT
Heat capacity for 1-butyl-3-methylimidazolium trifluoromethanesulfonate [C4mim]OTf in the temperature range of (5 to 370) K has been measured in an adiabatic calorimeter. The temperature Tfus = (290.98 +- 0.01) K and the enthalpy of fusion dfusHm = (19.32 +- 0.02) kJ*mol-1 were determined. A solid-phase transition was observed near T = 120 K. Thermodynamic functions for the compound in the condensed state were calculated. Trends in the solid-liquid phase change entropies, OAtrSm, for 1-alkyl-3-methylimidazolium salts [Cnmim]An were analyzed. The increment to OAtrS was shown to increase with n. It was found that OAtrSm = 66.4 +- 1.3 J.K-1.mol-1 for all the studied [C4mim]An ionic liquids except [C4mim]NTf2. This difference can be partly explained by formation of two distinguishable conformers of the NTf2- anion in the liquid state.
Compounds
# Formula Name
1 C9H15F3N2O3S 1-butyl-3-methylimidazolium trifluoromethanesulfonate
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
  • Molar enthalpy of transition or fusion, kJ/mol ; Crystal 1
  • Crystal 1
  • Liquid
  • Gas
  • Adiabatic calorimetry
  • 1
  • POMD
  • 1
  • Molar enthalpy of transition or fusion, kJ/mol ; Crystal 2
  • Crystal 2
  • Crystal 1
  • Gas
  • Adiabatic calorimetry
  • 1
  • POMD
  • 1
  • Triple point temperature, K ; Crystal 1
  • Crystal 1
  • Liquid
  • Gas
  • Adiabatic calorimetry
  • 1
  • POMD
  • 1
  • Triple point temperature, K ; Crystal 2
  • Crystal 2
  • Crystal 1
  • Gas
  • Adiabatic calorimetry
  • 1
  • POMD
  • 1
  • Molar heat capacity at constant pressure, J/K/mol ; Crystal 2
  • Temperature, K; Crystal 2
  • Pressure, kPa; Crystal 2
  • Crystal 2
  • Vacuum adiabatic calorimetry
  • 19
  • POMD
  • 1
  • Molar heat capacity at constant pressure, J/K/mol ; Crystal 1
  • Temperature, K; Crystal 1
  • Pressure, kPa; Crystal 1
  • Crystal 1
  • Vacuum adiabatic calorimetry
  • 19
  • POMD
  • 1
  • Molar heat capacity at constant pressure, J/K/mol ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Vacuum adiabatic calorimetry
  • 10
  • POMD
  • 1
  • Molar heat capacity at saturation pressure, J/K/mol ; Crystal
  • Temperature, K; Crystal
  • Crystal
  • Gas
  • Vacuum adiabatic calorimetry
  • 85
  • POMD
  • 1
  • Molar heat capacity at saturation pressure, J/K/mol ; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • Vacuum adiabatic calorimetry
  • 34
  • POMD
  • 1
  • Molar heat capacity at saturation pressure, J/K/mol ; Crystal
  • Temperature, K; Crystal
  • Crystal
  • Gas
  • Vacuum adiabatic calorimetry
  • 2
  • POMD
  • 1
  • Molar heat capacity at saturation pressure, J/K/mol ; Crystal
  • Temperature, K; Crystal
  • Crystal
  • Gas
  • Vacuum adiabatic calorimetry
  • 98
  • POMD
  • 1
  • Molar heat capacity at saturation pressure, J/K/mol ; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • Vacuum adiabatic calorimetry
  • 4
  • POMD
  • 1
  • Molar heat capacity at saturation pressure, J/K/mol ; Crystal
  • Temperature, K; Crystal
  • Crystal
  • Gas
  • Vacuum adiabatic calorimetry
  • 10
  • POMD
  • 1
  • Molar heat capacity at saturation pressure, J/K/mol ; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • Vacuum adiabatic calorimetry
  • 2
  • POMD
  • 1
  • Molar heat capacity at saturation pressure, J/K/mol ; Crystal
  • Temperature, K; Crystal
  • Crystal
  • Gas
  • Vacuum adiabatic calorimetry
  • 5
  • POMD
  • 1
  • Molar heat capacity at saturation pressure, J/K/mol ; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • Vacuum adiabatic calorimetry
  • 1
  • POMD
  • 1
  • Molar heat capacity at saturation pressure, J/K/mol ; Crystal
  • Temperature, K; Crystal
  • Crystal
  • Gas
  • Vacuum adiabatic calorimetry
  • 61
  • POMD
  • 1
  • Molar enthalpy function {Hm(T)-Hm(0)}/T, J/K/mol ; Crystal 2
  • Temperature, K; Crystal 2
  • Pressure, kPa; Crystal 2
  • Crystal 2
  • Vacuum adiabatic calorimetry
  • 18
  • POMD
  • 1
  • Molar enthalpy function {Hm(T)-Hm(0)}/T, J/K/mol ; Crystal 1
  • Temperature, K; Crystal 1
  • Pressure, kPa; Crystal 1
  • Crystal 1
  • Vacuum adiabatic calorimetry
  • 18
  • POMD
  • 1
  • Molar enthalpy function {Hm(T)-Hm(0)}/T, J/K/mol ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Vacuum adiabatic calorimetry
  • 10
  • POMD
  • 1
  • Molar entropy, J/K/mol ; Crystal 2
  • Temperature, K; Crystal 2
  • Pressure, kPa; Crystal 2
  • Crystal 2
  • Vacuum adiabatic calorimetry
  • 18
  • POMD
  • 1
  • Molar entropy, J/K/mol ; Crystal 1
  • Temperature, K; Crystal 1
  • Pressure, kPa; Crystal 1
  • Crystal 1
  • Vacuum adiabatic calorimetry
  • 18
  • POMD
  • 1
  • Molar entropy, J/K/mol ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Vacuum adiabatic calorimetry
  • 10