Thermochemical studies of 1-Hydroxyisoquinoline (cas 118-31-0), 5-hydroxyisoquinoline and 1,5-dihydroxyisoquinoline

Add time:08/27/2019    Source:sciencedirect.com

The standard (p∘ = 0.1 MPa) molar enthalpies of formation, ΔfHm∘, for crystalline 1-hydroxyisoquinoline, 5-hydroxyisoquinoline and 1,5-diidroxyisoquinoline, were derived from the standard molar enthalpies of combustion, in oxygen, at the temperature 298.15 K, measured by static bomb-combustion calorimetry. The standard molar enthalpies of sublimation, ΔcrgHm∘, at T = 298.15 K, were determined by Calvet microcalorimetry. The results were as follows: -ΔcHm∘(cr)/kJ·mol-1ΔcrgHm∘/kJ·mol-11-Hydroxyisoquinoline4395.1 ± 1.5113.6 ± 2.25-Hydroxyisoquinoline4455.2 ± 1.9109.6 ± 2.11,5-Dihydroxyisoquinoline4194.1 ± 2.2123.6 ± 2.2

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