Thermodynamics Research Center / ThermoML | Thermochimica Acta

Vapor pressure, kinetics and enthalpy of sublimation of bis(2,2,6,6-tetramethyl-3,5-heptanedionato)copper(II)

Johnson, M. G.[M. George], Selvakumar, J., Nagaraja, K. S.
Thermochim. Acta 2009, 495, 1-2, 38-41
ABSTRACT
The kinetics of sublimation of bis(2,2,6,6-tetramethyl-3,5-heptanedionato)copper(II), [Cu(tmhd)2] was studied by non-isothermal and isothermal thermogravimetric (TG) methods. The non-isothermal sublimation activation energy values determined following the procedures of Friedman, Kissinger, and Flynn.Wall methods yielded 93+-5, 67+-2, and 73+-4kJmol.1, respectively and the isothermal sublimation activation energy was found to be 97+-3kJmol.1 over the temperature range of 375.435K. The dynamic TG run proved the complex to be completely volatile and the equilibrium vapor pressure (pe)T of the complex over the temperature range of 375.435K determined by a TG-based transpiration technique, yielded a value of 96+-2kJmol.1 for its standard enthalpy of sublimation.
Compounds
# Formula Name
1 C22H38CuO4 bis(2,2,6,6-tetramethyl-3,5-heptanedionato)copper(II)
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
  • Vapor or sublimation pressure, kPa ; Crystal
  • Temperature, K; Crystal
  • Crystal
  • Gas
  • Rate of evaporation
  • 7