
TY  - JOUR
A1  - Ahrland, S 
A1  - Ishiguro, S 
A1  - Portanova, R 
T1  - Thermodynamics and structures in solvents coordinating through nitrogen. I. Enthalpies of transfer from water to pyridine and acetonitrile for some monovalent cations and anions
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1983
VL  - 36
IS  - 9
SP  - 1805
EP  - 1812
KW  - 
UR  - https://doi.org/10.1071/CH9831805 
N2  - The enthalpies of transfer &#916;Htrº, between water and the aprotic solvents pyridine and acetonitrile have been determined for a number of 1-1 electrolytes. To calculate &#916;Htrº for the single ions, the tatb assumption that &#916;Htrº,(Ph4As+) = &#916;HtrºBPh4-) for all solvents has been applied. The results are compared with those found earlier for the transfer between water and dimethyl sulfoxide. The values of &#916;Htrº, differ widely between different ions, from exothermic by c. 30 kJ/mol to endothermic by about the same amount. Endothermic values are found for Cl- and, though much smaller, for Br-, and also for the large tetraalkylammonium ion Bu4N+. Compared to the differences in &#916;Htrº, found between the various ions, the differences found for a certain ion between different solvents are small. The decrease of AH,&quot;, in the sequence Cl- > Br- > I- runs almost parallel in the three aprotic solvents, and is much less steep than in water. This reflects the influence of ligand hydrogen bonding in the protic solvent. 
ER  -

