ABSTRACT

The enthalpies of solution of N,N -dimethylethyleneurea (1,3-dimethyl-2-imidazolidinone) in water, methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, and t-butanol (2-methyl-2-propanol) were measured calorimetrically at 298.15K. For comparison purposes, the previous data on enthalpic effects of 1,1,3,3-tetramethylurea dissolution (solvation) in the same solvents were analyzed. It has been concluded that the intramolecular cyclization of tetramethylurea, to form dimethylethyleneurea, results in strengthening of the solute solvation and this tendency is more pronounced in a non-aqueous (alcoholic) medium.

Compounds

#	Formula	Name
1	C5H10N2O	1,3-dimethyl-2-imidazolidinone
2	H2O	water
3	CH4O	methanol
4	C2H6O	ethanol
5	C3H8O	propan-1-ol
6	C3H8O	propan-2-ol
7	C4H10O	butan-1-ol
8	C4H10O	2-methylpropan-2-ol

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	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Standard Abbe refractometry	1
POMD	1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Pycnometric method	1
POMD	1 2	Molar enthalpy of solution, kJ/mol ; Liquid	Molality, mol/kg - 1; Liquid Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	ISOPERIBOL	1
POMD	3 1	Molar enthalpy of solution, kJ/mol ; Liquid	Molality, mol/kg - 1; Liquid Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	ISOPERIBOL	1
POMD	4 1	Molar enthalpy of solution, kJ/mol ; Liquid	Molality, mol/kg - 1; Liquid Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	ISOPERIBOL	1
POMD	5 1	Molar enthalpy of solution, kJ/mol ; Liquid	Molality, mol/kg - 1; Liquid Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	ISOPERIBOL	1
POMD	6 1	Molar enthalpy of solution, kJ/mol ; Liquid	Molality, mol/kg - 1; Liquid Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	ISOPERIBOL	1
POMD	7 1	Molar enthalpy of solution, kJ/mol ; Liquid	Molality, mol/kg - 1; Liquid Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	ISOPERIBOL	1
POMD	8 1	Molar enthalpy of solution, kJ/mol ; Liquid	Molality, mol/kg - 1; Liquid Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	ISOPERIBOL	1

Thermodynamics Research Center / ThermoML | Thermochimica Acta

Effect of intramolecular cyclization on the enthalpies of solvation of tetramethylurea in water and alkanols at 298.15K

Ivanov, E. V.[Evgeniy V.], Smirnov, V. I.[Valeriy I.], Abrosimov, V. K.[Vladimir K.]

ABSTRACT