ABSTRACT

Electrolytic conductivities, densities, viscosities, refractive indices and speed of sound of tetrabutylammonium hexafluorophosphate (Bu4NPF6) have been studied in nitromethane (NM), 1,3-dioxolane (DO) and nitrobenzene (NB) at 298.15 K. The limiting molar conductivities, association constants, and the distance of closest approach of the ion have been evaluated using the Fuoss conductance equation (1978). The Walden product is obtained and discussed. The deviation of the conductmetric curves from linearity for the salt in 1,3-dioxolane indicates triple-ion formation, and therefore the corresponding conductance data have been analysed by using the Fuoss-Kraus theory of triple-ions. The limiting apparent molar volumes, experimental slopes derived from the Masson equation, and viscosity A and B coefficients using the Jones-Dole equation have been interpreted in terms of ion-ion and ion-solvent interactions, respectively. Molar refraction have been calculated using the Lorentz-Lorenz equation. The adiabatic compressibility have been evaluated using the speed of sound values. There after, the limiting apparent molar adiabatic compressibility have been calculated and discussed.

Compounds

#	Formula	Name
1	C16H36F6NP	tetrabutylammonium hexafluorophosphate
2	CH3NO2	nitromethane
3	C3H6O2	1,3-dioxolane
4	C6H5NO2	nitrobenzene

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	2	Mass density, kg/m3 ; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid		Liquid	Vibrating tube method	1
POMD	2	Viscosity, Pa*s ; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid		Liquid	Capillary tube (Ostwald; Ubbelohde) method	1
POMD	2	Refractive index (other wavelength) ; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Wavelength, nm; Liquid		Liquid	Standard Abbe refractometry	1
POMD	2	Speed of sound, m/s ; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid		Liquid	Fixed Frequency Variable Path Interferometer	1
POMD	3	Mass density, kg/m3 ; Liquid	Pressure, kPa; Liquid Temperature, K; 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	Refractive index (other wavelength) ; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Wavelength, nm; Liquid		Liquid	Standard Abbe refractometry	1
POMD	3	Speed of sound, m/s ; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid		Liquid	Fixed Frequency Variable Path Interferometer	1
POMD	4	Mass density, kg/m3 ; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid		Liquid	Vibrating tube method	1
POMD	4	Viscosity, Pa*s ; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid		Liquid	Capillary tube (Ostwald; Ubbelohde) method	1
POMD	4	Refractive index (other wavelength) ; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Wavelength, nm; Liquid		Liquid	Standard Abbe refractometry	1
POMD	4	Speed of sound, m/s ; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid		Liquid	Fixed Frequency Variable Path Interferometer	1
POMD	2 1	Mass density, kg/m3 ; Liquid	Amount concentration (molarity), mol/dm3 - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vibrating tube method	7
POMD	2 1	Viscosity, Pa*s ; Liquid	Amount concentration (molarity), mol/dm3 - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Capillary tube (Ostwald; Ubbelohde) method	7
POMD	2 1	Molar conductivity, S*m2/mol ; Liquid	Amount concentration (molarity), mol/dm3 - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Alternating current cell with electrodes	15
POMD	2 1	Refractive index (other wavelength) ; Liquid	Amount concentration (molarity), mol/dm3 - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Wavelength, nm; Liquid	Liquid	Standard Abbe refractometry	7
POMD	2 1	Speed of sound, m/s ; Liquid	Amount concentration (molarity), mol/dm3 - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Fixed Frequency Variable Path Interferometer	7
POMD	3 1	Mass density, kg/m3 ; Liquid	Amount concentration (molarity), mol/dm3 - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vibrating tube method	7
POMD	3 1	Viscosity, Pa*s ; Liquid	Amount concentration (molarity), mol/dm3 - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Capillary tube (Ostwald; Ubbelohde) method	7
POMD	3 1	Molar conductivity, S*m2/mol ; Liquid	Amount concentration (molarity), mol/dm3 - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Alternating current cell with electrodes	15
POMD	3 1	Refractive index (other wavelength) ; Liquid	Amount concentration (molarity), mol/dm3 - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Wavelength, nm; Liquid	Liquid	Standard Abbe refractometry	7
POMD	3 1	Speed of sound, m/s ; Liquid	Amount concentration (molarity), mol/dm3 - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Fixed Frequency Variable Path Interferometer	7
POMD	4 1	Mass density, kg/m3 ; Liquid	Amount concentration (molarity), mol/dm3 - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vibrating tube method	7
POMD	4 1	Viscosity, Pa*s ; Liquid	Amount concentration (molarity), mol/dm3 - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Capillary tube (Ostwald; Ubbelohde) method	7
POMD	4 1	Molar conductivity, S*m2/mol ; Liquid	Amount concentration (molarity), mol/dm3 - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Alternating current cell with electrodes	15
POMD	4 1	Refractive index (other wavelength) ; Liquid	Amount concentration (molarity), mol/dm3 - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Wavelength, nm; Liquid	Liquid	Standard Abbe refractometry	7
POMD	4 1	Speed of sound, m/s ; Liquid	Amount concentration (molarity), mol/dm3 - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Fixed Frequency Variable Path Interferometer	7

Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Ionic solvation of tetrabutylammonium hexafluorophosphate in pure nitromethane, 1, 3-dioxolane and nitrobenzene: A comparative physicochemical study

Roy, Mahendra Nath, Ekka, Deepak, Dewan, Rajani

ABSTRACT