Correlation of the Solubilizing Abilities of 1-Butyl-1-methylpiperidinium Bis(trifluoromethylsulfonyl)imide and 1-Butyl-1-methylpyrrolidinium Tetracyanoborate
2012
Chromatographic retention data were measured for a wide range of organic solutes on 1-butyl-1-methylpyrrolidinium tetracyanoborate ([BMPyrr]+[B(CN)4]−) and 1-butyl-1-methyl-piperidinium bis(trifluoromethylsulfonyl)imide ([BMPip]+[Tf2N]−) stationary phases at 323 K and 353 K. The measured retention factors were combined with published infinite dilution activity coefficient and gas-to-water partition coefficient data to yield gas-to-anhydrous ionic liquid (IL) and water-to-anhydrous IL partition coefficients. Both sets of partition coefficients were analyzed using the Abraham model. The derived Abraham model correlations describe the observed gas-to-IL (log10 K) and water-to-IL (log10 P) partition coefficient data to within average standard deviations of about 0.10 and 0.15 log10 units, respectively.
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