Vapor pressures and enthalpies of vaporization of a series of γ and δ-lactones by correlation gas chromatography

• Published in: The Journal of chemical thermodynamics Vol. 73; pp. 262 - 268
• Main Authors: Kozlovskiy, Mikhail, Gobble, Chase, Chickos, James
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.06.2014
• Subjects: Correlation gas chromatography; Enthalpy of vaporization; Vapor pressure; γ- and δ-Lactones; Enthalpy of vaporization; Correlation gas chromatography; Vapor pressure; γ- and δ-Lactones
• ISSN: 0021-9614; 1096-3626
• DOI: 10.1016/j.jct.2014.01.016

[Display omitted] •The vaporization enthalpies of γ-octanolactone, γ- and δ-undecanolactone and γ and δ-dodecanolactone are reported.•Equations for predicting the vapor pressures over the temperature range T=(298.15 to 350)K are provided.•Vaporization enthalpies are compared to predicted values. The vaporization enthalpies of γ-octanolactone, γ- and δ-undecanolactone and γ and δ-dodecanolactone used commercially as flavor ingredients are reported as are their vapor pressures over the temperature range T=(298.15 to 350)K. Vaporization enthalpies at T=298.15K of: (66.0±3.9), (79.4±4.4), (80.1±4.5), (83.9±4.6), and (84.61±4.7)kJ·mol−1 and vapor pressures also at T=298.15K of: (2.8±0.9), (0.12±0.05), (0.09±0.04), (0.04±0.02), and (0.03±0.02)Pa, respectively, have been evaluated by correlation gas chromatography experiments. The vaporization enthalpies of the lactones studied are reproduced within ±0.5kJ·mol−1 using a group additivity scheme reported previously for γ- and δ-lactones. The vaporization enthalpies of the γ- and δ-lactones are compared to a similar series of ω-lactones.