Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Thermodynamic properties of dicarbonyl rhodium o-semiquinonate complex whose crystals display photomechanical properties

Smirnova, N. N., Abakumov, G. A., Cherkasov, V. K., Kozhanov, K. A., Arapova, A. V., Bubnov, M. P.
J. Chem. Thermodyn. 2006, 38, 6, 678-684
ABSTRACT
In an adiabatic low-pressure calorimeter, the temperature dependence of the standard molar heat capacity of paramagnetic dicarbonyl rhodium complex with o-semiquinone (CO)2Rh(SQ) has been determined in the range from T = (6 to 355) K mainly with an accuracy of about 0.3%. Over the ranges from T = (205 to 234) K, T = (266 to 315) K and T = (316 to 345) K physical transformations have been revealed and their enthalpies and entropies have been estimated. The experimental data were used to calculate the thermodynamic functions C?p;m=R; DT 0Hm=oR KP; DT 0 Sm=R and Um 1/4 DT 0 SmDT 0Hm=T (where R is the universal gas constant) between T = (0 and 355) K. The fractal dimension D in the heat capacity function of the fractal variant of Debye heat capacity theory has been evaluated.
Compounds
# Formula Name
1 C16H20O4Rh dicarbonyl rhodium complex with o-semiquinone
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
  • Molar enthalpy of transition or fusion, kJ/mol ; Crystal 4
  • Crystal 4
  • Crystal 3
  • Gas
  • Adiabatic calorimetry
  • 1
  • POMD
  • 1
  • Molar enthalpy of transition or fusion, kJ/mol ; Crystal 3
  • Crystal 3
  • Crystal 2
  • Gas
  • Adiabatic calorimetry
  • 1
  • POMD
  • 1
  • Molar enthalpy of transition or fusion, kJ/mol ; Crystal 2
  • Crystal 2
  • Crystal 1
  • Gas
  • Adiabatic calorimetry
  • 1
  • POMD
  • 1
  • Triple point temperature, K ; Crystal 4
  • Crystal 4
  • Crystal 3
  • Gas
  • Adiabatic calorimetry
  • 1
  • POMD
  • 1
  • Triple point temperature, K ; Crystal 3
  • Crystal 3
  • Crystal 2
  • Gas
  • Adiabatic calorimetry
  • 1
  • POMD
  • 1
  • Triple point temperature, K ; Crystal 2
  • Crystal 2
  • Crystal 1
  • Gas
  • Adiabatic calorimetry
  • 1
  • POMD
  • 1
  • Molar heat capacity at constant pressure, J/K/mol ; Crystal 4
  • Temperature, K; Crystal 4
  • Pressure, kPa; Crystal 4
  • Crystal 4
  • VADIAC:UFactor:6
  • 116
  • POMD
  • 1
  • Molar heat capacity at constant pressure, J/K/mol ; Crystal 3
  • Temperature, K; Crystal 3
  • Pressure, kPa; Crystal 3
  • Crystal 3
  • VADIAC:UFactor:6
  • 72
  • POMD
  • 1
  • Molar heat capacity at constant pressure, J/K/mol ; Crystal 2
  • Temperature, K; Crystal 2
  • Pressure, kPa; Crystal 2
  • Crystal 2
  • VADIAC:UFactor:6
  • 35
  • POMD
  • 1
  • Molar heat capacity at constant pressure, J/K/mol ; Crystal 1
  • Temperature, K; Crystal 1
  • Pressure, kPa; Crystal 1
  • Crystal 1
  • VADIAC:UFactor:6
  • 21