ABSTRACT

The standard (p = 0.1 MPa) molar enthalpies of combustion in oxygen of five N-thenoylthiocarbamic-O-n-alkylesters, C4H3SCONHCSOR, R = Et (Httee), n-Pr (Httpe), n-Bu (Httbe), n-Pen (Httpene), and n-Hex (Htthe), were measured, at T = 298.15 K, by rotating- bomb calorimetry. The standard molar enthalpies of sublimation of these compounds were determined using Calvet microcalorimetry. These values were used to derive the standard molar enthalpies of formation of the title compounds, in their crystalline and gaseous phases, respectively. Furthermore, differential scanning calorimetry was applied in order to measure the temperatures and enthalpies of fusion for all compounds. Entropies of fusion were derived from the experimental results and the odd and even effect was found.

Compounds

#	Formula	Name
1	H2O4S	sulfuric acid
2	CO2	carbon dioxide
3	N2	nitrogen
4	H2O	water
5	O2	oxygen
6	C8H9NO2S2	carbamothioic acid, N-(2-thienylcarbonyl)-, O-ethyl ester
7	C9H11NO2S2	carbamothioic acid, N-(2-thienylcarbonyl)-, o-propyl ester
8	C10H13NO2S2	carbamothioic acid, N-(2-thienylcarbonyl)-, o-butyl ester
9	C11H15NO2S2	carbamothioic acid, N-(2-thienylcarbonyl)-, o-pentyl ester
10	C12H17NO2S2	carbamothioic acid, N-(2-thienylcarbonyl)-, o-hexyl ester

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	Phase	Method	#Points
POMD	6	Molar enthalpy of transition or fusion, kJ/mol ; Crystal		Crystal Liquid Air at 1 atmosphere	DSC	1
POMD	6	Triple point temperature, K ; Crystal 1		Crystal 1 Liquid Air at 1 atmosphere	DTA	1
POMD	6	Molar enthalpy of vaporization or sublimation, kJ/mol ; Crystal	Temperature, K; Crystal	Crystal Gas	Static calorimetry	1
POMD	6	Molar enthalpy, kJ/mol ; Gas	Temperature, K; Gas Pressure, kPa; Gas	Gas	Small (less than 1 g) adiabatic calorimetry	1
POMD	7	Molar enthalpy of transition or fusion, kJ/mol ; Crystal		Crystal Liquid Air at 1 atmosphere	DSC	1
POMD	7	Triple point temperature, K ; Crystal 1		Crystal 1 Liquid Air at 1 atmosphere	DTA	1
POMD	7	Molar enthalpy of vaporization or sublimation, kJ/mol ; Crystal	Temperature, K; Crystal	Crystal Gas	Static calorimetry	1
POMD	7	Molar enthalpy, kJ/mol ; Gas	Temperature, K; Gas Pressure, kPa; Gas	Gas	Drop calorimetry	1
POMD	8	Molar enthalpy of transition or fusion, kJ/mol ; Crystal		Crystal Liquid Air at 1 atmosphere	DSC	1
POMD	8	Triple point temperature, K ; Crystal 1		Crystal 1 Liquid Air at 1 atmosphere	DTA	1
POMD	8	Molar enthalpy of vaporization or sublimation, kJ/mol ; Crystal	Temperature, K; Crystal	Crystal Gas	Static calorimetry	1
POMD	8	Molar enthalpy, kJ/mol ; Gas	Temperature, K; Gas Pressure, kPa; Gas	Gas	Drop calorimetry	1
POMD	9	Molar enthalpy of transition or fusion, kJ/mol ; Crystal		Crystal Liquid Air at 1 atmosphere	DSC	1
POMD	9	Triple point temperature, K ; Crystal 1		Crystal 1 Liquid Air at 1 atmosphere	DTA	1
POMD	9	Molar enthalpy of vaporization or sublimation, kJ/mol ; Crystal	Temperature, K; Crystal	Crystal Gas	Static calorimetry	1
POMD	9	Molar enthalpy, kJ/mol ; Gas	Temperature, K; Gas Pressure, kPa; Gas	Gas	Drop calorimetry	1
POMD	10	Molar enthalpy of transition or fusion, kJ/mol ; Crystal		Crystal Liquid Air at 1 atmosphere	DSC	1
POMD	10	Triple point temperature, K ; Crystal 1		Crystal 1 Liquid Air at 1 atmosphere	DTA	1
POMD	10	Molar enthalpy of vaporization or sublimation, kJ/mol ; Crystal	Temperature, K; Crystal	Crystal Gas	Static calorimetry	1
POMD	10	Molar enthalpy, kJ/mol ; Gas	Temperature, K; Gas Pressure, kPa; Gas	Gas	Drop calorimetry	1
RXND	1 6 2 3 4 5	Molar internal energy of reaction at constant volume, kJ/mol			Rotating bomb calorimetry	1
RXND	1 7 2 3 4 5	Molar internal energy of reaction at constant volume, kJ/mol			Rotating bomb calorimetry	1
RXND	1 8 2 3 4 5	Molar internal energy of reaction at constant volume, kJ/mol			Rotating bomb calorimetry	1
RXND	1 9 2 3 4 5	Molar internal energy of reaction at constant volume, kJ/mol			Rotating bomb calorimetry	1
RXND	1 10 2 3 4 5	Molar internal energy of reaction at constant volume, kJ/mol			Rotating bomb calorimetry	1

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Thermochemical studies on five N-thenoylthiocarbamic-O-n-alkylesters

Ribeiro da Silva, M. A. V.[Manuel A. V.], Monteiro, I. M. M.[Isabel M. M.], Santos, L. M. N. B. F.[Luis M. N. B. F.], Schroder, B.[Bernd]

ABSTRACT