Search

Vapor pressures for the main component of the biodiesel – methyl oleate were measured by using the static method. For this purpose, a new setup for vapor pressure measurements in the range (0.1 to 1000) Pa and the elevated temperatures up to 450 K has been designed and tested using the reference materials benzoic acid and naphthalene. Absolute vapor pressures and sublimation (vaporization) enthalpies for the tested compounds were in a good agreement with the most reliable literature data. [ABSTRACT FROM AUTHOR]

The absolute vapor pressures over the solid and liquid 2-biphenylmethanol and 4-biphenylmethanol were measured using the transpiration method. The standard molar enthalpies of vaporization/sublimation were derived from the temperature dependence of vapor pressures. The standard molar enthalpy of fusion of 2-biphenylmethanol was measured using DSC. The available data on solid-gas, liquid-gas and solid-liquid phase transitions available in the literature have been collected, combined with own experimental results and evaluated using the structure-property relationships and quantum-chemical calculations. The high-level G3MP2 and G4 quantum-chemical methods were used to establish consistency of the experimental and theoretical results. Conformational analysis of 2-biphenylmethanol showed the possible presence of a hydrogen bond between the hydroxyl group and the aromatic ring. The strength of the intramolecular hydrogen bonding in 2-biphenylmethanol and 4-biphenylmethanol was assessed from thermochemistry and quantum-chemical calculations. [ABSTRACT FROM AUTHOR]