ABSTRACT

The heat capacities and the densities have been measured for aqueous solutions of N-acetyl-N'-methylglycinamide, N-acetyl-N'-methyl-l-a-alaninamide, N-acetyl-N'-methyl-l-a-valinamide, N-acetyl-N'-methyl-l-a-leucinamide, N-acetyl-N'-methyl-l-a-serinamide, N-acetyl-N'-methyl-l-a-threoninamide, and N-acetyl-N'-methyl-l-a-histidinamide. These results have been used to calculate the contributions of the amino acid side chains to the partial molar heat capacities and the partial molar volumes. The results were compared with literature data obtained for similar systems.

Compounds

#	Formula	Name
1	C5H10N2O2	2-acetamido-N-methylacetamide
2	C6H12N2O2	(S)-2-acetamido-N-methylpropanamide
3	C8H16N2O2	N-acetyl-N'-methylvalinamide
4	C9H18N2O2	(S)-2-acetamido-N,4-dimethylpentanamide
5	C6H12N2O3	N-acetyl-N'-methyl-l-alpha-serinamide
6	C7H14N2O3	N-acetyl-N'-methyl-L-alpha-threoninamide
7	C9H14N4O2	N-acetyl-N'-methyl-L-alpha-histidinamide
8	H2O	water

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 8	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vibrating tube method	9
POMD	1 8	Apparent molar heat capacity, J/K/mol ; Liquid	Temperature, K; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid	Liquid	XDSC:UFactor:0.5	35
POMD	8 2	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vibrating tube method	7
POMD	8 2	Apparent molar heat capacity, J/K/mol ; Liquid	Temperature, K; Liquid Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid	Liquid	XDSC:UFactor:0.5	35
POMD	8 3	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vibrating tube method	6
POMD	8 3	Apparent molar heat capacity, J/K/mol ; Liquid	Temperature, K; Liquid Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid	Liquid	XDSC:UFactor:0.5	56
POMD	8 4	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vibrating tube method	9
POMD	8 4	Apparent molar heat capacity, J/K/mol ; Liquid	Temperature, K; Liquid Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid	Liquid	XDSC:UFactor:0.5	42
POMD	8 5	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 5; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vibrating tube method	11
POMD	8 5	Apparent molar heat capacity, J/K/mol ; Liquid	Temperature, K; Liquid Molality, mol/kg - 5; Liquid	Pressure, kPa; Liquid	Liquid	XDSC:UFactor:0.5	42
POMD	8 6	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 6; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vibrating tube method	15
POMD	8 6	Apparent molar heat capacity, J/K/mol ; Liquid	Temperature, K; Liquid Molality, mol/kg - 6; Liquid	Pressure, kPa; Liquid	Liquid	XDSC:UFactor:0.5	49
POMD	7 8	Mass density, kg/m3 ; Liquid	Amount concentration (molarity), mol/dm3 - 7; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vibrating tube method	14
POMD	7 8	Apparent molar heat capacity, J/K/mol ; Liquid	Temperature, K; Liquid Molality, mol/kg - 7; Liquid	Pressure, kPa; Liquid	Liquid	XDSC:UFactor:0.5	56

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

Partial Molar Heat Capacities at Chosen Temperatures in the Range (298.15 to 328.15) K and Partial Molar Volumes at 298.15 K of N-Acetyl-N'-methyl-L-.alpha.-amino Acid Amides in Aqueous Solution

Belica, S.[Sylwia], Ludzik, K.[Katarzyna], Palecz, B.[Bartlomiej]

ABSTRACT