Abstract
The free energies of
solvent transfer of Ag+, K+, Cl-,
Br-, I- and ClO4- from acetonitrile
to glycolonitrile, 3-hydroxypropionitrile and mixtures of
2,2,2-trifluoroethanol or water with acetonitrile are reported. ��� The anion-solvating properties of a series
of hydroxylic solvents decrease by 24 kJ mol-1 in the order CF3CH2OH
> CNCH2OH > CNCH2CH2OH > CH3OH
> CH3CH2OH; Ag+-solvating properties
decrease by 70 kJ mol-1 in the order CH3CN > HOCH2CH2CN
> HOCH2CN > CH3CH2OH > CF3CH2OH;
and the K+- solvating properties decrease by 27 kJ mol-1
in the order CH3CN > HOCH2CH2CN ≈ CH3OH
≈ HOCH2CN ≈ CH3CH2OH > CF3CH2OH.
It is not possible to make more than qualitative generalizations as to the
ion-solvating properties of solvent mixtures if only the solvating properties
of the pure components are known. Multi-site solvents like CNCH2OH
are compared with related equimolar mixtures, like CH3CN/HOH, in
their ability to solvate ions.
Cited by
15 articles.
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