Abstract
The freezing-point depression of the ternary systems tetraalkylammonium bromides-t-butanol-water for the first five homologs of R4NBr was measured. In the case of Bu4NBr, the effect of size of the alcohol (methahol ton-butanol) was also investigated. From the corresponding freezing-point data for the binary systems the apparent salting constants were calculated. The true salting constantsk s were obtained by extrapolation to infinite dilution. These are all very close to zero at the freezing temperature. From the corresponding thermochemical data the temperature dependence ofk s was calculated, and above 5°C all the R4NBr salts int-butanol; the salting-in increases with temperature and with the size of the hydrophobic cations. The scaled-particle theory is at present the only one which can account semiquantitatively for the temperature dependence of the salting-in effect.
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On leave of absence from Chemistry Department, The University, Sheffield S3 7HF, England
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Desnoyers, J.E., Perron, G., Léger, S. et al. Salting-in of alcohols in aqueous solutions by tetraalkylammonium bromides at the freezing temperature. J Solution Chem 7, 165–178 (1978). https://doi.org/10.1007/BF00650524
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DOI: https://doi.org/10.1007/BF00650524