ABSTRACT

The heat capacity for tris-dipivaloylmethanate of iron Fe(C11O2H19)3 within a temperature range 57 316K has been measured by the adiabatic method.Ananomaly of heat capacity has been discovered with a maximum at~115 K, which points to the phase transformation of the Fe(C11O2H19)3 complex. Anomalous contributions to entropy and enthalpy have been revealed. The anomalous entropy equals R ln 2 in the limits of experimental accuracy. The possible reason of phase transition is considered.

Compounds

#	Formula	Name
1	C33H57FeO6	iron tris-dipivaloylmethanate

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 2			Crystal 2 Crystal 1 Gas	Adiabatic calorimetry	1
POMD	1	Triple point temperature, K ; Crystal 2			Crystal 2 Crystal 1 Gas	Adiabatic calorimetry	1
POMD	1	Normal melting temperature, K ; Crystal 1			Crystal 1 Liquid Air at 1 atmosphere	VISOBS	1
POMD	1	Mass density, kg/m3 ; Crystal 1	Temperature, K; Crystal 1 Pressure, kPa; Crystal 1		Crystal 1	Pycnometric method	1
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Crystal 1	Temperature, K; Crystal 1	Pressure, kPa; Crystal 1	Crystal 1	Vacuum adiabatic calorimetry	47
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Crystal 2	Temperature, K; Crystal 2	Pressure, kPa; Crystal 2	Crystal 2	Vacuum adiabatic calorimetry	28

Thermodynamics Research Center / ThermoML | Thermochimica Acta

Phase transition in Fe(C11O2H19)3 at 115.25 K

Bespyatov, M. A., Naumov, V. N., Stabnikov, P. A.

ABSTRACT