Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Heterogeneous interaction between zwitterions of some l- -amino acids and ethanol molecule in water at 298.15K

Palecz, B.[Bartlomiej], Nadolna, A.[Agnieszka]
Fluid Phase Equilib. 2006, 250, 1-2, 49-52
ABSTRACT
Dissolution enthalpies of l- -aminobutyric acid, l- -isoleucine, l- -serine, l- -threonine and l- -cysteine in water and aqueous ethanol solutions have been measured by calorimetry at a temperature of 298.15 K. The obtained results were used to calculate the enthalpic heterogeneous pair interaction coefficients between zwitterions of amino acids and a molecule of ethanol in water. These values were interpreted in the terms of the hydrophobic or hydrophilic effects of the side chains of amino acids on their interactions with a polar molecule of ethanol in water.
Compounds
# Formula Name
1 C4H9NO2 (S)-2-aminobutanoic acid
2 C6H13NO2 2-amino-3-methylpentanoic acid
3 C3H7NO3 L-serine
4 C3H7NO2S (R)-2-amino-3-mercaptopropanoic acid
5 C4H9NO3 L-threonine
6 H2O water
7 C2H6O ethanol
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
  • 7
  • 1
  • 6
  • Molar enthalpy of solution, kJ/mol ; Liquid
  • Solvent: Molality, mol/kg - 7; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Mole fraction - 1; Liquid
  • Liquid
  • ISOPERIBOL
  • 5
  • POMD
  • 7
  • 2
  • 6
  • Molar enthalpy of solution, kJ/mol ; Liquid
  • Solvent: Molality, mol/kg - 7; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Mole fraction - 2; Liquid
  • Liquid
  • ISOPERIBOL
  • 5
  • POMD
  • 3
  • 7
  • 6
  • Molar enthalpy of solution, kJ/mol ; Liquid
  • Solvent: Molality, mol/kg - 7; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Mole fraction - 3; Liquid
  • Liquid
  • ISOPERIBOL
  • 10
  • POMD
  • 7
  • 5
  • 6
  • Molar enthalpy of solution, kJ/mol ; Liquid
  • Solvent: Molality, mol/kg - 7; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Mole fraction - 5; Liquid
  • Liquid
  • ISOPERIBOL
  • 10
  • POMD
  • 4
  • 7
  • 6
  • Molar enthalpy of solution, kJ/mol ; Liquid
  • Solvent: Molality, mol/kg - 7; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Mole fraction - 4; Liquid
  • Liquid
  • ISOPERIBOL
  • 10