ABSTRACT

Apparent molar volumes (V/) and apparent molar isentropic compression (K/;s) of glycine, L-alanine, L-valine and L-leucine in (0.05, 0.10, 0.15, 0.20) mol kg 1 aqueous solution of thiamine hydrochloride (thiamine-HCl) have been determined at T = (305.15, 310.15 and 315.15) K and experimental pressure p = 0.1 MPa, from the density and speed of sound measurements. The partial molar volume Vo /, standard partial molar volumes of transfer DVo / for amino acids from water to aqueous thiamine-HCl, partial molar isentropic compression K/;s and partial molar isentropic compression of transfer DKo /;s have been calculated from the corresponding data. Group contributions of amino acids to partial molar volume are also determined. The pair and triplet interaction coefficients are obtained from partial molar volumes of transfer and partial molar isentropic compression of transfer. The partial molar expansibility o@Vo /=@TPp, second order derivative o@2Vo /=@T2Pp have also been calculated. The parameters obtained have been used to explain the results in terms of (solute-solute)/(ion-ion), (solute-solvent) interactions, structure making and structure breaking behaviour of amino acids in aqueous thiamine-HCl solutions.

Compounds

#	Formula	Name
1	C2H5NO2	2-aminoacetic acid
2	C3H7NO2	(S)-2-aminopropanoic acid
3	C5H11NO2	L-valine
4	C6H13NO2	L-leucine
5	C12H18Cl2N4OS	thiamine hydrochloride
6	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 5 6	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Solvent: Molality, mol/kg - 5; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	108
POMD	1 5 6	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Solvent: Molality, mol/kg - 5; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid Frequency, MHz; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	108
POMD	2 5 6	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Solvent: Molality, mol/kg - 5; Liquid Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	108
POMD	2 5 6	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Solvent: Molality, mol/kg - 5; Liquid Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid Frequency, MHz; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	108
POMD	5 3 6	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Solvent: Molality, mol/kg - 5; Liquid Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	108
POMD	5 3 6	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Solvent: Molality, mol/kg - 5; Liquid Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid Frequency, MHz; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	108
POMD	4 5 6	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Solvent: Molality, mol/kg - 5; Liquid Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	108
POMD	4 5 6	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Solvent: Molality, mol/kg - 5; Liquid Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid Frequency, MHz; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	108
POMD	5 6	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 5; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	12
POMD	5 6	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 5; Liquid	Pressure, kPa; Liquid Frequency, MHz; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	12

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Thermodynamics of (solute + solute) and (solute + solvent) interactions of homologous series of amino acids with thiamine hydrochloride in aqueous medium at T = (305.15, 310.15, 315.15) K: A volumetric and acoustic approach

Kumar, H.[Harsh], Behal, I.[Isha]

ABSTRACT