This is part 7 of a series of contributions by the critical properties group of the IUPAC Commission I.2 on Thermodynamics, Subcommittee on Thermodynamic Data. It presents all known experimental data for the critical constants of oxygen compounds other than alkanols and cycloalkanols. Experimental data and recommended values are given together with their uncertainties. The uncertainties are relatively small for the compounds of low molar mass that are stable at the critical temperature but are greater for many of the compounds, particularly those of higher molar mass, because they are unstable at the critical temperature. Where appropriate, critical temperatures have been converted to the ITS-90 scale.
Ideal gas thermodynamic properties of the eight bromo and lodomethanesThe standard chemical thermodynamic properties of phenol, o-cresol, m-cresol, and p-cresol were calculated by use of the rigid rotor harmonic oscillator approximation. The partition functions for internal rotation of -OH and -CH3 groups were calculated as a direct ·sum over the internal rotation energy levels. It was assumed that n-l'rf'!':ol i!': .. mixture of two rotational isomers. Values of molf'('ular pArAmf'tf'rS, fundAmental frequencies, potential barriers to internal rotation and enthalpies of formation were selected from among those reported in the lit· erature and from some additional molecular orbital calculations.
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