ABSTRACT

The enthalpies of solution of 1-aminobutylphosphonic acid (NvalP), 1-amino-2-methylpropylphosphonic acid (ValP), 1-amino-3-(methylthio)propylphosphonic acid (MetP), N-methyl-1-aminopropylphosphonic acid (Me-HalP), and N,N-dimethyl-1-aminopropylphosphonic acid (Me2-HalP) in water and aqueous urea solutions were measured within the molality range from (0.5 to 4) mol (U)*kg 1 (H2O) at a temperature of 298.15 K. The results obtained were used to determine the standard enthalpies of solution, whose values were then used to calculate the enthalpic heterogeneous pair (phosphonic amino acid urea) interaction coefficients.

Compounds

#	Formula	Name
1	CH4N2O	urea
2	H2O	water
3	C4H12NO3P	(1-amino-2-methylpropyl)phosphonic acid
4	C4H12NO3P	(1-aminobutyl)phosphonic acid
5	C4H12NO3PS	(1-amino-3-(methylthio)propyl)phosphonic acid
6	C4H12NO3P	(1-(methylamino)propyl)phosphonic acid
7	C5H14NO3P	(1-(dimethylamino)propyl)phosphonic acid

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 3	Molar enthalpy of solution, kJ/mol ; Liquid	Solvent: Molality, mol/kg - 1; Liquid Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	ISOPERIBOL	26
POMD	1 2 4	Molar enthalpy of solution, kJ/mol ; Liquid	Solvent: Molality, mol/kg - 1; Liquid Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	ISOPERIBOL	30
POMD	1 2 5	Molar enthalpy of solution, kJ/mol ; Liquid	Solvent: Molality, mol/kg - 1; Liquid Molality, mol/kg - 5; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	ISOPERIBOL	22
POMD	1 2 6	Molar enthalpy of solution, kJ/mol ; Liquid	Solvent: Molality, mol/kg - 1; Liquid Molality, mol/kg - 6; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	ISOPERIBOL	27
POMD	1 2 7	Molar enthalpy of solution, kJ/mol ; Liquid	Solvent: Molality, mol/kg - 1; Liquid Molality, mol/kg - 7; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	ISOPERIBOL	35
POMD	2 3	Molar enthalpy of solution, kJ/mol ; Liquid	Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	ISOPERIBOL	6
POMD	2 4	Molar enthalpy of solution, kJ/mol ; Liquid	Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	ISOPERIBOL	5
POMD	2 5	Molar enthalpy of solution, kJ/mol ; Liquid	Molality, mol/kg - 5; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	ISOPERIBOL	6
POMD	2 6	Molar enthalpy of solution, kJ/mol ; Liquid	Molality, mol/kg - 6; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	ISOPERIBOL	6
POMD	2 7	Molar enthalpy of solution, kJ/mol ; Liquid	Molality, mol/kg - 7; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	ISOPERIBOL	5

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

Calorimetric Studies of the Interactions between Several Aminophosphonic Acids and Urea in Aqueous Solutions at 298.15 K

Palecz, B.[Bartlomiej], Grala, A.[Aleksandra], Kudzin, Z.[Zbigniew]

ABSTRACT