The standard (po=0.1 MPa) molar enthalpies of formation of crystalline thianthrene and monothiodibenzoylmethane, HDBMS, at T=298.15 K were measured by rotating-bomb calorimetry and the standard molar enthalpies of sublimation at T=298.15 K of dibenzoylmethane (HDBMO) and monothiodibenzoylmethane (HDBMS) were measured by microcalorimetry. From the present results it could be shown that, in these molecules, the intramolecular hydrogen bond energy (O-H???O), is ca. 20 kJ ? mol-1 larger than for (S-H???O).
Compounds
#
Formula
Name
1
H2O4S
sulfuric acid
2
CO2
carbon dioxide
3
H2O
water
4
O2
oxygen
5
C15H12OS
monothiodibenzoylmethane
6
C15H12O2
1,3-diphenyl-1,3-propanedione
7
C12H8S2
thianthrene
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
5
Molar enthalpy of vaporization or sublimation, kJ/mol ; Crystal
Temperature, K; Crystal
Crystal
Gas
Static calorimetry
1
POMD
5
Molar enthalpy, kJ/mol ; Gas
Temperature, K; Gas
Pressure, kPa; Gas
Gas
Drop calorimetry
1
POMD
6
Molar enthalpy, kJ/mol ; Gas
Temperature, K; Gas
Pressure, kPa; Gas
Gas
Drop calorimetry
1
POMD
6
Molar enthalpy of vaporization or sublimation, kJ/mol ; Crystal
Temperature, K; Crystal
Crystal
Gas
Static calorimetry
1
RXND
1
5
2
3
4
Specific internal energy of reaction at constant volume, J/g
BOMBRT:BOMBRT
1
RXND
7
1
2
3
4
Specific internal energy of reaction at constant volume, J/g