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Electrical Conductivity and Solubility of KF in N,N-Dimethylformamide up to 125 °C

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journal contribution
posted on 17.08.2001, 00:00 by Gavin Macfie, Richard. G. Compton, Horacio R. Corti
The solubility of potassium fluoride (KF) in dimethylformamide (DMF) and the dielectric constant of the solvent have been determined in the temperature range (25−125) °C by means of electrical conductivity and capacity measurements. The solubility of KF in this aprotic solvent seems to be almost temperature independent (mean value (0.33 ± 0.03) × 10-3 mol·dm-3). The speciation of KF in DMF is also discussed in relation to the concentration dependence of the molar conductance. It is concluded that ion pairs could account for around 50 to 70% of the species and that triple ions could be present in the concentration range studied.