Thermodynamics Research Center / ThermoML | Thermochimica Acta

Structure and properties of congruent melting 18-crown-6 crystalline hydrates

Pustovgar, E. A., Igumnov, S. N., Kiskin, M. A., Uspenskaya, I. A.
Thermochim. Acta 2010, 510, 1-2, 154-159
ABSTRACT
Crystallographic characteristics of congruent melting 18-crown-6 crystalline hydrates were specified using X-ray structure analysis. Melting enthalpies of 18-crown-6 tetra- and hexahydrates have been determined; melting points of these compounds have been specified. Liquidus of 18-crown-6 water system has been calculated in the concentration range xH2O = 0.750 0.935 by using the received data and known thermodynamic properties of the solution
Compounds
# Formula Name
1 C12H24O6 1,4,7,10,13,16-hexaoxacyclooctadecane
2 C12H32O10 1,4,7,10,13,16-hexaoxacyclooctadecane, hydrate (1:4)
3 C12H36O12 18-crown-6 hexahydrate
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
  • Normal melting temperature, K ; Crystal
  • Crystal
  • Liquid
  • Air at 1 atmosphere
  • DTA
  • 1
  • POMD
  • 2
  • Mass density, kg/m3 ; Crystal
  • Temperature, K; Crystal
  • Pressure, kPa; Crystal
  • Crystal
  • X-ray diffraction
  • 1
  • POMD
  • 3
  • Mass density, kg/m3 ; Crystal
  • Temperature, K; Crystal
  • Pressure, kPa; Crystal
  • Crystal
  • X-ray diffraction
  • 1