ABSTRACT

In this paper, the effect of three imidazolium based ionic liquids with different anions, 1-butyl-3 methylimidazolium tetrafluoroburate, [BMIM]BF4, 1-butyl-3-methylimidazolium bromide, [BMIm]Br and 1-butyl-3-methylimidazolium chloride, [BMIM]Cl on thermodynamic properties of acetaminophen is investigated. For this purpose density, speed of sound, and electrical conductivity for acetaminophen in aqueous solutions of ionic liquid have been measured at T = (293.15 to 308.15) K at atmospheric pressure. The standard partial molar volumes 0 . V , limiting apparent molar isentropic compressibility 0 . K , hydration number nH and Hepler fs constants ( V T )P Y2 0 Y 2 . have been calculated from the density and speed of sound data. The limiting molar conductivities 0 (C) and ion association constants Ka for the ionic liquids in aqueous solutions of acetaminophen have been estimated using the low concentration Chemical Model (lcCM). These results confirm the fact that there is a strong attractive interaction between acetaminophen molecules and the ionic liquids. That interaction becomes stronger with increasing in anion size.

Compounds

#	Formula	Name
1	C8H9NO2	N-acetyl-p-aminophenol
2	H2O	water
3	C8H15BrN2	1-butyl-3-methylimidazolium bromide
4	C8H15ClN2	1-butyl-3-methylimidazolium 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	1 2 3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Solvent: Molality, mol/kg - 3; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	160
POMD	1 2 3	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Solvent: Molality, mol/kg - 3; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid Frequency, MHz; Liquid	Liquid	Single path-length method	160
POMD	1 2 3	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Solvent: Molality, mol/kg - 1; Liquid Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid Frequency, MHz; Liquid	Liquid	Alternating current cell with electrodes	118
POMD	1 2 4	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Solvent: Molality, mol/kg - 4; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	160
POMD	1 2 4	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Solvent: Molality, mol/kg - 4; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid Frequency, MHz; Liquid	Liquid	Single path-length method	160
POMD	1 2 4	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Solvent: Molality, mol/kg - 1; Liquid Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid Frequency, MHz; Liquid	Liquid	Alternating current cell with electrodes	118
POMD	2 3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	16
POMD	2 3	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid Frequency, MHz; Liquid	Liquid	Single path-length method	16
POMD	2 4	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	16
POMD	2 4	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid Frequency, MHz; Liquid	Liquid	Single path-length method	16

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

Effect of Some Imidazolium-Based Ionic Liquids with Different Anions on the Thermodynamic Properties of Acetaminophen in Aqueous Media at T = 293.15 to 308.15 K

Shekaari, Hemayat, Zafarani-Moattar, Mohammed Taghi, Ghaffari, Fariba

ABSTRACT