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

Conductivity and Dissociation Constants of Quaternary Ammonium Perchlorates and Picrates in 4-Methyl-pentan-2-one

Goga, S. T.[Sergey T.], Lebedev, A. V., Mchedlov-Petrossyan, N. O.[Nikolay O.]
J. Chem. Eng. Data 2010, 55, 5, 1887-1892
ABSTRACT
The dissociation of 14 ionophores, namely, seven symmetrical (C1 to C7) and five asymmetrical quaternary ammonium perchlorates and two tetraalkylammonium picrates (all with linear hydrocarbon chains), in 4-methyl-pentan-2-one was studied at 25 deg C (?r = 12.92) using the conductance method. The values of the association constants of the quaternary ammonium cation, Ct+, with ClO4- vary from (7.4 +- 0.3)*103 L*mol-1 for tetramethylammonium to (2.4 +- 0.1)*103 L*mol-1 for tetrahexyl- and tetraheptylammonium; a distinct dependence on the size of the Ct+, especially for symmetrical cations, is evident. The values of the limiting molar conductivities ?0/S*mol-1*cm2 vary from 122.8 to 90.0 (+- 0.7). The plot of ?0 versus the reciprocal cube root of the total van der Waals volume of the cations, VCt-1/3, is close to linear up to tetrapentylammonium and hexadecyltrimethylammonium, while for larger cations (with 21 to 28 carbon atoms) the ?0 values stay practically constant. At the same time, symmetrical and asymmetrical cations with the same VCt values possess equal mobility.
Compounds
# Formula Name
1 C8H20ClNO4 tetraethylammonium perchlorate
2 C14H22N4O7 ammonium, tetraethyl-, picrate
3 C22H38N4O7 1-butanaminium, N.N.N-tributyl-, salt with 2,4,6-trinitrophenol (1:1)
4 C6H12O 4-methylpentan-2-one
5 C4H12ClNO4 tetramethylammonium perchlorate
6 C12H28ClNO4 tetrapropylammonium perchlorate
7 C16H36ClNO4 tetrabutylammonium perchlorate
8 C20H44ClNO4 tetrapentylammonium perchlorate
9 C24H52ClNO4 tetrahexylammonium perchlorate
10 C28H60ClNO4 N,N,N-triheptylheptan-1-aminium perchlorate
11 C19H42ClNO4 N,N,N-trimethyl-1-hexadecanaminium perchlorate
12 C21H38ClNO4 1-hexadecylpyridinium perchlorate
13 C12H28ClNO4 N,N,N-triethyl-1-hexanaminium perchlorate
14 C21H46ClNO4 N,N,N-trimethyl-1-octadecanaminium perchlorate
15 C9H14ClNO4 1-butylpyridinium perchlorate
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
  • 4
  • Normal boiling temperature, K ; Liquid
  • Liquid
  • Gas
  • Distillation
  • 1
  • POMD
  • 4
  • 14
  • Molar conductivity, S*m2/mol ; Liquid
  • Amount concentration (molarity), mol/dm3 - 14; Liquid
  • Pressure, kPa; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Alternating current cell with electrodes
  • 14
  • POMD
  • 4
  • 15
  • Molar conductivity, S*m2/mol ; Liquid
  • Amount concentration (molarity), mol/dm3 - 15; Liquid
  • Pressure, kPa; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Alternating current cell with electrodes
  • 15
  • POMD
  • 4
  • 2
  • Molar conductivity, S*m2/mol ; Liquid
  • Amount concentration (molarity), mol/dm3 - 2; Liquid
  • Pressure, kPa; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Alternating current cell with electrodes
  • 15
  • POMD
  • 4
  • 3
  • Molar conductivity, S*m2/mol ; Liquid
  • Amount concentration (molarity), mol/dm3 - 3; Liquid
  • Pressure, kPa; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Alternating current cell with electrodes
  • 15
  • POMD
  • 4
  • 6
  • Molar conductivity, S*m2/mol ; Liquid
  • Amount concentration (molarity), mol/dm3 - 6; Liquid
  • Pressure, kPa; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Alternating current cell with electrodes
  • 15
  • POMD
  • 4
  • 7
  • Molar conductivity, S*m2/mol ; Liquid
  • Amount concentration (molarity), mol/dm3 - 7; Liquid
  • Pressure, kPa; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Alternating current cell with electrodes
  • 15
  • POMD
  • 4
  • 8
  • Molar conductivity, S*m2/mol ; Liquid
  • Molality, mol/kg - 8; Liquid
  • Pressure, kPa; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Alternating current cell with electrodes
  • 15
  • POMD
  • 4
  • 9
  • Molar conductivity, S*m2/mol ; Liquid
  • Amount concentration (molarity), mol/dm3 - 9; Liquid
  • Pressure, kPa; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Alternating current cell with electrodes
  • 15
  • POMD
  • 4
  • 10
  • Molar conductivity, S*m2/mol ; Liquid
  • Amount concentration (molarity), mol/dm3 - 10; Liquid
  • Pressure, kPa; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Alternating current cell with electrodes
  • 15
  • POMD
  • 4
  • 11
  • Molar conductivity, S*m2/mol ; Liquid
  • Amount concentration (molarity), mol/dm3 - 11; Liquid
  • Pressure, kPa; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Alternating current cell with electrodes
  • 15
  • POMD
  • 4
  • 12
  • Molar conductivity, S*m2/mol ; Liquid
  • Amount concentration (molarity), mol/dm3 - 12; Liquid
  • Pressure, kPa; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Alternating current cell with electrodes
  • 15
  • POMD
  • 4
  • 13
  • Molar conductivity, S*m2/mol ; Liquid
  • Amount concentration (molarity), mol/dm3 - 13; Liquid
  • Pressure, kPa; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Alternating current cell with electrodes
  • 15
  • POMD
  • 4
  • 5
  • Molar conductivity, S*m2/mol ; Liquid
  • Amount concentration (molarity), mol/dm3 - 5; Liquid
  • Pressure, kPa; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Alternating current cell with electrodes
  • 10
  • 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
  • 7