Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Apparent molal volumes of symmetrical and asymmetrical isomers of tetrabutylammonium bromide in water at several temperatures

Moreno, N.[Nicolas], Malagon, A.[Andres], Buchner, R.[Richard], Vargas, E. F.[Edgar F.]
J. Chem. Thermodyn. 2014, 68, 117-121
ABSTRACT
Apparent molal volumes of a series of differently substituted quaternary ammonium bromides, namely tetra-iso-butyl-, tetra-sec-butyl-, tetra-n-butyl-, di-n-butyl-di-sec-butyl- and di-n-butyl-di-iso-butylammonium bromide have been determined as a function of molal concentration at (298.15, 303.15 and 308.15) K. Partial molar volumes at infinite dilution and ionic molar volumes of these quaternary ammonium cations were determined. Structural volume contributions to the ionic molar volume were also calculated. The symmetric and asymmetric quaternary ammonium cations are structure making ions. The contribution of the branched butyl chains predominates over the linear butyl chains in the asymmetric cations.
Compounds
# Formula Name
1 H2O water
2 C16H36BrN tetrabutylammonium bromide
3 C16H36BrN tetra-iso-butyl ammonium bromide
4 C16H36BrN tetra-sec-butyl ammonium bromide
5 C16H36BrN N-butyl-N,N-bis(1-methylpropyl)-1-butanaminium bromide
6 C16H36BrN N-butyl-N,N-bis(2-methylpropyl)-1-butanaminium bromide
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
  • 2
  • 1
  • Mass density, kg/m3 ; Liquid
  • Temperature, K; Liquid
  • Molality, mol/kg - 2; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Vibrating tube method
  • 30
  • POMD
  • 1
  • 3
  • Mass density, kg/m3 ; Liquid
  • Temperature, K; Liquid
  • Molality, mol/kg - 3; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Vibrating tube method
  • 30
  • POMD
  • 1
  • 4
  • Mass density, kg/m3 ; Liquid
  • Temperature, K; Liquid
  • Molality, mol/kg - 4; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Vibrating tube method
  • 30
  • POMD
  • 6
  • 1
  • Mass density, kg/m3 ; Liquid
  • Temperature, K; Liquid
  • Molality, mol/kg - 6; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Vibrating tube method
  • 30
  • POMD
  • 1
  • 5
  • Mass density, kg/m3 ; Liquid
  • Temperature, K; Liquid
  • Molality, mol/kg - 5; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Vibrating tube method
  • 30