Abstract
In this work, a thermodynamic study of four enantiopure terpenoids, myrtenal, myrtenol, α-terpineol, and trans-sobrerol is presented. Vapor pressures of the selected terpenoids were determined using two static apparatus in a combined temperature range from 248 to 363 K. Heat capacities of the samples were determined by Tian-Calvet calorimetry in the temperature range from 261 to 353 K. Phase behaviour (melting temperature, fusion enthalpy, crystallization temperature, and potential polymorphic transformations) were studied using heat-flux calorimetry. Using a combination of quantum-chemical calculations and statistical thermodynamics, ideal-gas heat capacities and entropies were determined. Finally, consistency of the phase behaviour, vapor pressure, and heat capacity experimental data with the theoretically calculated data was assessed using the method of simultaneous correlation.
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