Activity coefficients at infinite dilution for organic solutes dissolved in two 1,2,3-tris(diethylamino)cyclopenylium based room temperature ionic liquids

Infinite dilution activity coefficients and gas-to-liquid partition coefficients have been determined for at least 45 different organic solutes of varying polarity and hydrogen-bonding character dissolved in anhydrous 1,2,3-tris(diethylamino)cyclopropenylium dicyanamide, ([TDC](+)[DCA](-)), and 1,2,3-tris(diethylamino)cyclopropenylium bis(trifluoromethylsulfonyl)imide, ([TDC](+)[Tf2N](-)). The measured infinite dilution activity coefficients were used to calculation selectivity values for various practical separation problems. Computations showed ([TDC](+)[DCA](-)) should afford better performance in hexane/benzene and hexane/pyridine separation problems than sulfolane and N-methyl-2-pyrrolidone. Abraham model correlations were derived for predicting solute transfer into both ([TDC](+)[DCA](-)) and ([TDC](+)[Tf2N](-)) from water and from the gas phase. The derived correlations describe the observed solute transfer partition coefficients to within 0.13 (or fewer) log units. (C) 2016 Elsevier B.V. All rights reserved.