ABSTRACT

Molar enthalpies of vaporization of the branched aliphatic alkyl esters of dicarboxylic acids R-CO2-(CH2)n-CO2-R with n = (0 4) with R = iso-C3H7, tert-C4H9 were obtained from the temperature dependence of the vapour pressure measured by the transpiration method. These experimental results were checked for internal consistency and compared with the data available from the literature. A linear correlation of enthalpies of vaporization at T = 298.15 K of the alkyl esters of dicarboxylic acids with the number of carbon atoms, as well as with the Kovat's indices on the low-polar GC column has been found.

Compounds

#	Formula	Name
1	C8H14O4	diisopropyl oxalate
2	C9H16O4	diisopropyl malonate
3	C10H18O4	bis(1-methylethyl) butanedioate
4	C11H20O4	bis(1-methylethyl) pentanedioate
5	C10H18O4	di-tert-butyl oxalate
6	C11H20O4	bis(1,1-dimethylethyl) propanedioate
7	C12H22O4	di-tert-butyl succinate
8	C13H24O4	di-tert-butyl glutarate
9	C14H26O4	di-tert-butyl adipate

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	1	Molar enthalpy of transition or fusion, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Derived by Second law	18
POMD	1	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid	Liquid Gas	Transpiration method	18
POMD	2	Molar enthalpy of transition or fusion, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Derived by Second law	17
POMD	2	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid	Liquid Gas	Transpiration method	17
POMD	3	Molar enthalpy of transition or fusion, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Derived by Second law	12
POMD	3	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid	Liquid Gas	Transpiration method	12
POMD	4	Molar enthalpy of transition or fusion, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Derived by Second law	12
POMD	4	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid	Liquid Gas	Transpiration method	12
POMD	5	Molar enthalpy of transition or fusion, kJ/mol ; Crystal	Temperature, K; Crystal	Crystal Gas	Derived by Second law	21
POMD	5	Molar enthalpy of transition or fusion, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Derived by Second law	15
POMD	5	Vapor or sublimation pressure, kPa ; Crystal	Temperature, K; Crystal	Crystal Gas	Transpiration method	21
POMD	5	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid	Liquid Gas	Transpiration method	15
POMD	6	Molar enthalpy of transition or fusion, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Derived by Second law	21
POMD	6	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid	Liquid Gas	Transpiration method	21
POMD	7	Molar enthalpy of transition or fusion, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Derived by Second law	16
POMD	7	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid	Liquid Gas	Transpiration method	16
POMD	8	Molar enthalpy of transition or fusion, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Derived by Second law	16
POMD	8	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid	Liquid Gas	Transpiration method	16
POMD	9	Molar enthalpy of transition or fusion, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Derived by Second law	18
POMD	9	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid	Liquid Gas	Transpiration method	18

Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Vapour pressure and enthalpy of vaporization of di-iso-propyl and di-tert-butyl esters of dicarboxylic acids

Portnova, S. V.[Svetlana V.], Krasnykh, E. L.[Eugen L.], Verevkin, S. P.[Sergey P.]

ABSTRACT