ABSTRACT

Osmotic coefficients of dilute aqueous solutions of ter-BuEt3NI, sec-BuEt3NI, iso-BuEt3NI, Bu2Me2NI, and Bu3EtNI are measured by the isopiestic method at 298.15 K. A branched isopiestic cell was used. The osmotic coefficients of tetraalkylammonium solutions were analyzed with the Debye Huckel limiting law. The results show that the osmotic coefficient varies in the following way: Pr3EtNI11 greater than n-BuEt3NI11 greater than Me4NI12 greater than Et4NI11 greater than ter-BuEt3NI greater than sec-BuEt3NI greater than iso-BuEt3NI greater than Bu2Et2NI greater than Bu3EtNI. The set of Pitzer parameters b = 1.2, ?1 = 2.0 was used. The results were fitted to the Pitzer model, and the parameters ?0, ?1, and C? were calculated. The results was interpreted in terms of solute solvent interactions.

Compounds

#	Formula	Name
1	H2O	water
2	C14H32IN	N,N-dibutyl-N-ethyl-1-butanaminium iodide
3	C10H24IN	N,N,N-triethyl-2-butanaminium iodide
4	C10H24N	N,N,N-triethyl-2-methyl-2-propanaminium
5	C10H24IN	N,N,N-triethyl-2-methyl-1-propanaminium iodide
6	C12H28IN	N-butyl-N,N-diethylbutan-1-aminium iodide

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 2	Mean ionic activity coefficient - 2 ; Liquid	Molality, mol/kg - 2; Liquid	Temperature, K; Liquid	Liquid Gas	Isopiestic method	44
POMD	1 2	Osmotic coefficient ; Liquid	Molality, mol/kg - 2; Liquid	Temperature, K; Liquid	Liquid Gas	ISOPIE	44
POMD	1 3	Mean ionic activity coefficient - 3 ; Liquid	Molality, mol/kg - 3; Liquid	Temperature, K; Liquid	Liquid Gas	Isopiestic method	44
POMD	1 3	Osmotic coefficient ; Liquid	Molality, mol/kg - 3; Liquid	Temperature, K; Liquid	Liquid Gas	ISOPIE	44
POMD	1 4	Mean ionic activity coefficient - 4 ; Liquid	Molality, mol/kg - 4; Liquid	Temperature, K; Liquid	Liquid Gas	Isopiestic method	44
POMD	1 4	Osmotic coefficient ; Liquid	Molality, mol/kg - 4; Liquid	Temperature, K; Liquid	Liquid Gas	ISOPIE	44
POMD	1 5	Mean ionic activity coefficient - 5 ; Liquid	Molality, mol/kg - 5; Liquid	Temperature, K; Liquid	Liquid Gas	Isopiestic method	44
POMD	1 5	Osmotic coefficient ; Liquid	Molality, mol/kg - 5; Liquid	Temperature, K; Liquid	Liquid Gas	ISOPIE	44
POMD	1 6	Mean ionic activity coefficient - 6 ; Liquid	Molality, mol/kg - 6; Liquid	Temperature, K; Liquid	Liquid Gas	Isopiestic method	44
POMD	1 6	Osmotic coefficient ; Liquid	Molality, mol/kg - 6; Liquid	Temperature, K; Liquid	Liquid Gas	ISOPIE	44

Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

Osmotic and Activity Coefficients of Dilute Aqueous Solutions of Unsymmetrical Tetraalkylammonium Iodides at 298.15 K

Blanco, L. H.[Luis H.], Amado-Gonzalez, E.[Eliseo]

ABSTRACT