ABSTRACT

The enthalpies of L-proline dissolution in aqueous solution of N,N-dimethylformamide (DMF) with a mole-fraction of DMF from x2 = (0-0.2) have been measured at 293.15-308.15 K. The results obtained have been used to calculate the standard enthalpies of solution (DsolHo) and transfer (DtrHo) of L-proline from water into mixtures as well as the enthalpy coefficients of pairwise interaction (hxy) of the solute with DMF in aqueous medium. The interconnection between enthalpy characteristics of L-proline dissolution (transfer) and the composition of (H2O+ DMF) mixture and its temperature have been established. The resulting data have been compared with those obtained before for some amino acids with cyclic side-chain: L-phenylalanine and L-tryptophan in the same mixed solvent at 298.15 K has been made.

Compounds

#	Formula	Name
1	C5H9NO2	L-proline
2	C3H7NO	dimethylformamide
3	H2O	water
4	ClK	potassium chloride

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	2 1 3	Molar enthalpy of solution, kJ/mol ; Liquid	Temperature, K; Liquid Solvent: Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid Mole fraction - 1; Liquid	Liquid	ISOPERIBOL	48
POMD	1 3	Molar enthalpy of solution, kJ/mol ; Liquid	Temperature, K; Liquid	Molality, mol/kg - 1; Liquid Pressure, kPa; Liquid	Liquid	ISOPERIBOL	4
POMD	4 3	Molar enthalpy of solution, kJ/mol ; Liquid	Molality, mol/kg - 4; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	ISOPERIBOL	10

Thermodynamics Research Center / ThermoML | Thermochimica Acta

Enthalpies of L-proline dissolution in aqueous solution of N,N-dimethylformamide at 293.15-308.15 K

Smirnov, V. I.[Valeriy I.], Badelin, V. G.[Valentin G.]

ABSTRACT