Lipkind, Dmitri Hanshaw, William Chickos, James S. Hypothetical Thermodynamic Properties. Subcooled Vaporization Enthalpies and Vapor Pressures of Polyaromatic Heterocycles and Related Compounds The vaporization enthalpies and vapor pressures of the liqiud phase from <i>T</i> = 298.15 K to <i>T</i> = 500 K of a series of polyaromatic nitrogen heterocyles (PANH) have been derived using correlation gas chromatography. The vaporization enthalpies at <i>T</i> = 298.15 K measured in kilojoules per mole include: tri-<i>n</i>-butylamine (62.7 ± 1.3), 2-phenylpyridine (68.4 ± 1.9), 3-phenylpyridine (68.4 ± 1.6), quinazoline (58.9 ± 2.0), (−)-nicotine (63.9 ± 2.1), 4-phenylpyrimidine (68.8 ± 2.5), 2,2-dipyridine (67.0 ± 2.3), 2,4-dipyridine (70.9 ± 1.6), 4,4-dipyridine·1.7H<sub>2</sub>O (70.7 ± 2.4), 4,4-dipyridine (anhydrous, 71.1 ± 2.6), 1,7-phenanthroline (79.4 ± 4.7), 4,7-phenanthroline (80.8 ± 4.8), 2-benzylpyridine (69.8 ± 2.8), and 9-methylcarbazole (79.4 ± 3.2). Fusion enthalpies (kJ·mol<sup>−1</sup>, <i>T</i><sub>fus</sub>/K) are also reported for 2,4-bipyridine (17.4 ± 0.4, 332.8), 4,4-dipyridine (16.1 ± 1.0, 377.5), 4,4-dipyridine·1.7H<sub>2</sub>O (35.5 ± 0.5, 341.3), 4-phenylpyrimidine (18.8 ± 0.3, 334.1), 1,7-phenanthroline (18.2 ± 0.3, 350.3), and 4,7-phenanthroline (21.8 ± 0.5, 445.5). Vaporization enthalpy comparisons are made with available literature values by means of a thermochemical cycle; agreement is within the combined experimental uncertainties for all compounds except 4,4-dipyridine, for which evidence is provided that suggests that the current sublimation enthalpy value in the literature was measured on a hydrated form. Vapor pressures and normal boiling temperatures for the liquid phase are compared with available experimental literature values at elevated temperatures. Good agreement is found for most compounds. 298.15 K;Related CompoundsThe vaporization enthalpies;Subcooled Vaporization Enthalpies;sublimation enthalpy value;phenanthroline;Hypothetical Thermodynamic Properties;literature values;polyaromatic nitrogen heterocyles;dipyridine;correlation gas chromatography;PANH 2009-10-08
    https://acs.figshare.com/articles/journal_contribution/Hypothetical_Thermodynamic_Properties_Subcooled_Vaporization_Enthalpies_and_Vapor_Pressures_of_Polyaromatic_Heterocycles_and_Related_Compounds/2822581
10.1021/je900034d.s001