Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Low-temperature heat capacity of tetrakis(2,2,6,6-tetramethyl-3,5-heptanedionato)zirconium

Bespyatov, M. A., Cherniaikin, I. S., Zherikova, K. V., Naumov, V. N., Igumenov, I. K., Gelfond, N. V., Morozova, N. B.
J. Chem. Thermodyn. 2017, 110, 171-174
ABSTRACT
The heat capacity of tetrakis(2,2,6,6-tetramethyl-3,5-heptanedionato)zirconium (Zr(C11H19O2)4) was measured over the temperature range (9-306) K by adiabatic-shield calorimetry and found to be without transitions or thermal anomalies. The data obtained were used to calculate its thermodynamic functions (entropy, enthalpy, reduced Gibbs energy) in the range (0-306) K. They have the following values at 298.15 K: Cp = (1195.7 +- 1.8) J K-1 mol-1, D0,298.15Sm = (1298 +- 3) J K-1 mol-1, D0,298.15Hm = (194.7 +- 0.3) kJ mol-1, Fm = (645.2 +- 1.9) J K-1 mol-1. The value of the absolute entropy were used to calculate the entropy of formation of Zr(C11H19O2)4 at T = 298.15 K.
Compounds
# Formula Name
1 C44H76O8Zr tetrakis(2,2,6,6-tetramethyl-3,5-heptanedionato)zirconium
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
  • 1
  • Molar heat capacity at constant pressure, J/K/mol ; Crystal
  • Temperature, K; Crystal
  • Pressure, kPa; Crystal
  • Crystal
  • Vacuum adiabatic calorimetry
  • 71
  • POMD
  • 1
  • Molar heat capacity at constant pressure, J/K/mol ; Crystal
  • Temperature, K; Crystal
  • Pressure, kPa; Crystal
  • Crystal
  • Vacuum adiabatic calorimetry
  • 39
  • POMD
  • 1
  • Molar entropy, J/K/mol ; Crystal
  • Temperature, K; Crystal
  • Pressure, kPa; Crystal
  • Crystal
  • Vacuum adiabatic calorimetry
  • 39
  • POMD
  • 1
  • Molar enthalpy, kJ/mol ; Crystal
  • Temperature, K; Crystal
  • Pressure, kPa; Crystal
  • Crystal
  • Vacuum adiabatic calorimetry
  • 39