ABSTRACT

Effect of N-N'bis(2-pyridylmethylidene)-1,2-diiminoethane (BPIE) Schiff base on thermodynamic properties of ionic liquid, 1-hexyl-3-methylimidazolium bromide ([HMIm]Br) in N,N-dimethylformamide (DMF) solutions were determined at T = (298.15 K to 313.15) K. The standard partial molar volumes, 0 V O , partial molar volumes of transfer, 0 trV O ' , have been calculated using density data. The cosphere overlap model was used to interpretate partial molar volumes of transfer, 0 trV O ' ,.The calculated Hepler's constants, 2 0 2 V / T O g g , indicate that ionic liquid are structure-breaking (chaotropic). Ion association constants, a K , and limiting molar conductivities, 0 1/4 , viscosity B-coefficients and molar refractions, RD, have been used to confirm the conclusions obtained from the volumetric properties. The results were interpreted in terms of solute-solvent interactions and indicating an enhancement in the nonpolar!Vnonpolar interactions between the BPIE Schiff base and the ionic liquid.

Compounds

#	Formula	Name
1	C10H19BrN2	3-hexyl-1-methyl-1H-imidazolium bromide
2	C14H14N4	N,N'-bis(2-pyridinylmethylene)-1,2-ethanediamine
3	C3H7NO	dimethylformamide

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	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	3	Viscosity, Pa*s ; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid		Liquid	Capillary tube (Ostwald; Ubbelohde) method	1
POMD	3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	4
POMD	3 1	Molar conductivity, S*m2/mol ; Liquid	Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	OTHER::sMethod:Digital Conductivity Meter	10
POMD	3 1	Viscosity, Pa*s ; Liquid	Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Capillary tube (Ostwald; Ubbelohde) method	10
POMD	3 1	Refractive index (Na D-line) ; Liquid	Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Standard Abbe refractometry	10
POMD	3 1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	40
POMD	3 2	Viscosity, Pa*s ; Liquid	Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Capillary tube (Ostwald; Ubbelohde) method	4
POMD	3 2	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 2; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	16
POMD	3 2 1	Molar conductivity, S*m2/mol ; Liquid	Solvent: Molality, mol/kg - 2; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Digital Conductivity Meter	40
POMD	3 2 1	Viscosity, Pa*s ; Liquid	Solvent: Molality, mol/kg - 2; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Capillary tube (Ostwald; Ubbelohde) method	55
POMD	3 2 1	Refractive index (Na D-line) ; Liquid	Solvent: Molality, mol/kg - 2; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Standard Abbe refractometry	50
POMD	3 2 1	Mass density, kg/m3 ; Liquid	Solvent: Molality, mol/kg - 2; Liquid Temperature, K; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	220

Thermodynamics Research Center / ThermoML | Thermochimica Acta

Thermodynamic properties of ionic liquid, 1-hexyl-3-methylimidazolum bromide, + N-N'bis(2-pyridylmethylidene)-1,2-diiminoethane(BPIE) Schiff base + N,N- dimethylformamide solutions at T = (298.15 to 313.15) K

Shekaari, H.[Hemayat], Bezaatpour, A.[Abolfazl], Khoshalhan, M.[Maryam]

ABSTRACT