H. Touhara, K. Nakanishi
Oct 1, 1985
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0
Influential Citations
12
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Journal
The Journal of Chemical Thermodynamics
Abstract
Excess molar enthalpies have been measured at 298.15 K for methanol + pyridine, + 2-methylpyridine (α-picoline), and + 2,6-dimethylpyridine (2,6-lutidine), with an isothermal dilution calorimeter. All the mixtures exhibit negative excess enthalpies, the absolute values of which increase in the sequence: pyridine < α-picoline < 2,6-lutidine. The signs and relative magnitudes of thermodynamic excess functions are as follows: HmE < TSmE < GmE < 0. Enthalpies of hydrogen-bond formation between methanol and pyridines are estimated from the present HmEs and the results are discussed in terms of the base strengths of pyridines, specific solvation, and hydrogen bonding.