ABSTRACT

In the present research, the temperature dependence of the heat capacity Cp,mo = f(T) of tetraphenylantimony benzoate Ph4SbOC(O)Ph has been measured in the range T = (5 and 480) K in the precision adiabatic vacuum and differential scanning calorimeters and reported for the first time. In the studied temperature region the melting of the compound has been revealed and its standard thermodynamic characteristics were analyzed. The standard thermodynamic functions (pdeg. = 0.1 MPa) of Ph4SbOC(O)Ph in crystalline and liquid states were calculated with the obtained experimental data: Cp,mo/R, delta0THmo/RT, delta0TSmo/R and phimo = delta0TSmo - delta0THmo/T (where R is the universal gas constant) from T -greater than 0 to 480 K. The energy of combustion of Ph4SbOC(O)Ph was measured. The standard enthalpy of combustion, formation enthalpy, formation entropy, Gibbs energy of formation of the substance in the crystalline state at T = 298.15 K were calculated. Comparison of thermodynamic properties was made for the derivatives of antimony studied in the present work, Ph5Sb and other of type Ph3SbX2.

Compounds

#	Formula	Name
1	O4Sb2	antimony oxide (Sb2O4)
2	CO2	carbon dioxide
3	H2O	water
4	O2	oxygen
5	Sb	antimony
6	H2	hydrogen
7	C	graphite
8	C31H25O2Sb	tetraphenylantimony benzoate

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	8	Normal melting temperature, K ; Crystal			Crystal Liquid Air at 1 atmosphere	DTA	1
POMD	8	Molar enthalpy of transition or fusion, kJ/mol ; Crystal			Crystal Liquid Air at 1 atmosphere	DSC	1
POMD	8	Mass density, kg/m3 ; Crystal	Temperature, K; Crystal Pressure, kPa; Crystal		Crystal	X-ray diffraction	1
POMD	8	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Small (less than 1 g) adiabatic calorimetry	132
POMD	8	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	DSC	13
POMD	8	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	DSC	22
POMD	8	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Small (less than 1 g) adiabatic calorimetry	34
POMD	8	Molar enthalpy function {Hm(T)-Hm(0)}/T, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Small (less than 1 g) adiabatic calorimetry	34
POMD	8	Molar entropy, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Small (less than 1 g) adiabatic calorimetry	34
POMD	8	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	DSC	4
POMD	8	Molar enthalpy function {Hm(T)-Hm(0)}/T, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	DSC	4
POMD	8	Molar entropy, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	DSC	4
RXND	1 8 2 3 4	Molar internal energy of reaction at constant volume, kJ/mol				Static bomb calorimetry	1
RXND	5 8 6 7 4	Molar enthalpy of reaction, kJ/mol				Static bomb calorimetry	1

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Thermodynamics of tetraphenylantimony benzoate Ph4SbOC(O)Ph

Lyakaev, D.V., Markin, A.V., Smirnova, N.N., Sharutin, V.V., Sharutina, O.K.

ABSTRACT