ABSTRACT

Limiting partial molar volumes for six tertiary amines in methanol were obtained from accurate experimental density data at 298.15 K. Data analysis has been performed using the non H-bonded methanol approach and a model obeying the accurate Mansoori et al. equation of state for hard sphere mixtures. Volumetric contributions for the specific interaction between the lone pair of electrons of the amine group and the methanol have been obtained. Aliphatic hydrocarbons were used as reference compounds to account for the destruction of the methanol structure and non-polar solute-solvent interaction. Three types of differently shaped aliphatic hydrocarbons were considered aiming at analyzing the effect of the solute structure. Specific interactions between tertiary amines and methanol could then be derived. Hydrocarbons which are homomorphic forms of the amines were chosen as reference.

Compounds

#	Formula	Name
1	C6H15N	triethylamine
2	C9H21N	tripropylamine
3	C12H27N	tributylamine
4	C15H33N	tripentylamine
5	C18H39N	N,N-dihexyl-1-hexanamine
6	C24H51N	trioctylamine
7	CH4O	methanol

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	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	4	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	5	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	6	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	7	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	7 1	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vibrating tube method	11
POMD	7 2	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vibrating tube method	9
POMD	7 3	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vibrating tube method	8
POMD	7 4	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vibrating tube method	10
POMD	7 5	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 5; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vibrating tube method	10
POMD	7 6	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 6; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vibrating tube method	10

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Partial molar volume of tertiary amines in methanol at T = 298.15 K. Solvation, shape and specific interactions

Sousa, S. M. C.[Susana M. C.], Barbosa, E. F. G.[Ester F. G.], Lampreia, I. M. S.[Isabel M. S]

ABSTRACT