Thermodynamics Research Center / ThermoML | Thermochimica Acta

D2O H2O solvent isotope effects on the thermodynamic properties of 1,3-dimethyl-2-imidazolidinone hydration between 288.15 and 318.15K

Batov, D. V.[Dmitriy V.], Ivanov, E. V.[Evgeniy V.]
Thermochim. Acta 2008, 479, 1-2, 59-61
ABSTRACT
The enthalpies of solution of 1,3-dimethyl-2-imidazolidinone or N,N -dimethylethyleneurea in H2O and D2O were measured at 288.15, 298.15, 308.15, and 318.15 K. Standard enthalpies, heat capacities and entropies of solution (hydration), along with D2O H2O solvent isotope effects on the quantities in question, were computed. The enthalpies of the solute dissolution as well as corresponding solvent isotope effects were found to be negative and decreasing in magnitude with increasing temperature. It was concluded that, in spite of forming the heterocomponent H(D)-bonds in aqueous solutions of the cyclic methyl-substituted urea derivative studied, hydrophobic hydration is the predominant type of the solute hydration and it is enhanced in D2O.
Compounds
# Formula Name
1 C5H10N2O 1,3-dimethyl-2-imidazolidinone
2 H2O water
3 D2O water-d2
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
  • Refractive index (Na D-line) ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Standard Abbe refractometry
  • 1
  • POMD
  • 1
  • Mass density, kg/m3 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Vibrating tube method
  • 1
  • POMD
  • 2
  • Electrical conductivity, S/m ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • UNKNOWN
  • 1
  • POMD
  • 1
  • 2
  • Molar enthalpy of solution, kJ/mol ; Liquid
  • Temperature, K; Liquid
  • Molality, mol/kg - 1; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • ISOPERIBOL
  • 4
  • POMD
  • 1
  • 3
  • Molar enthalpy of solution, kJ/mol ; Liquid
  • Temperature, K; Liquid
  • Molality, mol/kg - 1; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • ISOPERIBOL
  • 4