Vaporization thermodynamics of compounds modeling lignin structural units

Abstract

Vapour pressures and standard molar enthalpies of vaporization of trans-anethole, estragole, eugenol, and trans-isoeugenol were derived by the transpiration method. A large number of the primary experimental results on temperature dependences of vapour pressures have been collected from the literature and have been treated uniformly in order to derive vaporization enthalpies at the reference temperature 298.15 K. The available data were evaluated and validated with help of empirical methods based on gas-chromatographic measurements and structure-property relationships.