Thermodynamic Properties of Polycyclic Aromatic Oxygen-Containing Compounds: I, Chroman and Isochroman: Topical Report.

摘要

Measurements leading to the calculation of the ideal-gas thermodynamic properties for chroman and isochroman are reported. Thermomechanical and thermophysical properties were determined by adiabatic heat-capacity calorimetry, combustion calorimetry, comparative ebulliometry, and inclined-piston manometry. Density measurements are reported for chroman. Results were used to calculate entropies, enthalpies, and Gibbs energies of formation for the ideal-gas at selected temperatures from near the respective triple point temperatures to 500 K. Published estimates of the ideal-gas properties based on group-contribution estimates show large deviations from the experimental values reported here. 34 refs., 12 tabs. (ERA citation 14:013179)