Solvation of fluoride ions 4. Gibbs energies of transfer from water to aqueous dimethylsulphoxide, propanone and 2-methylpropan-2-ol mixtures

✍ Scribed by G.T. Hefter

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 620 KB
• Volume: 73-74
• Category: Article
• ISSN: 0167-7322
• DOI: 10.1016/s0167-7322(97)00072-x

✦ Synopsis

Solubility data are reported at 298.15K for LiF, NaF and, to a lesser extent, KF in aqueous mixtures of dimethylsulphoxide (DMSO), propanone, (acetone, AC) and 2-methylpropan-2-01 (tertiary butanol, &BuOH) over virtually the entire solvent composition range. These data have been combined wherever possible with appropriate literature data to give standard Gibbs energies of transfer of the fluoride ion, A,G"(F), from water to the aqueous-organic mixtures on the basis of the TATB assumption.

Consistent with the poor acceptor properties of the cosolvents cJ: Hz0 all three systems show highly positive values of AtGo( However, both DMSO and r-BuOH systems show some interesting anomalies as a firnction of solvent composition.