Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

ABSTRACT

The vaporization enthalpies and vapor pressures of (+)-cedrol and nerolidol are reported at T = 298.15 K using a series of alcohols as standards by correlation gas chromatography. Vaporization enthalpies at T = 298.15 K of (88.3 +- 1.5, 91.4 +- 1.5, 92.7 +- 1.6) kJ mol 1 were evaluated for (+)-cedrol, Z-nerolidol and E-nerolidol, respectively. Upon injection into the gas chromatograph, (+)-cedrol was partially converted to a- and b-cedrene, identified by GCMS and independent synthesis. Additionally, the vaporization enthalpy of 1-adamantanol evaluated as an unknown and then used as a standard, compared well to the value calculated from the sublimation, fusion and solid-solid phase transition enthalpies previously reported. Liquid vapor pressures of (+)-cedrol, Z-nerolidol, E-nerolidol and 1-adamantanol are also reported as a function of temperature. A vapor pressure of 187.9 kPa is estimated for 1-adamantanol at the fusion temperature and the vapor pressure of solid 1-adamantanol at T = 298.15 K is reproduced within a factor of two of the literature value.