Thermodynamics Research Center / ThermoML | Thermochimica Acta

Enthalpies of solution of diglycylglycine in aqueous solution of amides at 298.15 K

Smirnov, V. I.[Valeriy I.], Badelin, V. G.[Valentin G.]
Thermochim. Acta 2011, 520, 1-2, 153-5
ABSTRACT
Calorimetric measurements have been carried out at 298.15 K in aqueous solutions of diglycylglycine containing formamide, N-methylformamide, N, N-dimethylformamide and N, Ndiethylformamide at concentrations of amides as co-solvents up to 0.4 mole fractions. The results obtained have been used to calculate the standard enthalpies of solution ( ss H sol ' ) and transfer ( ss H tr ' ) of the diglycylglycine from water into the mixtures as well as the enthalpy coefficients of pair-wise interaction (hxy) of the solute with the amide in aqueous media. The hxy values were correlated with the properties of organic solvents using Kamlet-Taft equation. The results of the calorimetric measurements have been discussed with regard to the intermolecular interactions occurring in these systems.
Compounds
# Formula Name
1 C6H11N3O4 glycylglycylglycine
2 CH3NO formamide
3 C2H5NO N-methylformamide
4 C3H7NO dimethylformamide
5 C5H11NO N,N-diethylformamide
6 H2O water
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
  • 6
  • Molar enthalpy of solution, kJ/mol ; Liquid
  • Solvent: Molality, mol/kg - 2; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Molality, mol/kg - 1; Liquid
  • Liquid
  • ISOPERIBOL
  • 11
  • POMD
  • 3
  • 1
  • 6
  • Molar enthalpy of solution, kJ/mol ; Liquid
  • Solvent: Molality, mol/kg - 3; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Molality, mol/kg - 1; Liquid
  • Liquid
  • ISOPERIBOL
  • 12
  • POMD
  • 4
  • 1
  • 6
  • Molar enthalpy of solution, kJ/mol ; Liquid
  • Solvent: Molality, mol/kg - 4; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Molality, mol/kg - 1; Liquid
  • Liquid
  • ISOPERIBOL
  • 12
  • POMD
  • 1
  • 5
  • 6
  • Molar enthalpy of solution, kJ/mol ; Liquid
  • Solvent: Molality, mol/kg - 5; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Molality, mol/kg - 1; Liquid
  • Liquid
  • ISOPERIBOL
  • 12