Vapor−Liquid Critical Properties of Elements and Compounds. 10. Organic Compounds Containing Halogens

Abstract

This review is part 10 of a series of contributions by the critical properties group of the previous IUPAC Commission I.2 on Thermodynamics, Subcommittee on Thermodynamic Data and the present IUPAC Project #2000-026-1-100, Critical Compilation of Vapour Liquid Critical Properties, sponsored by the Physical and Biophysical Chemistry Division. It presents all known experimental data for the critical constants of hydrocarbons containing halogens. Recommendations are given together with uncertainties. Critical temperatures have been converted to ITS-90, and the molar masses are based on the relative atomic masses recommended by the IUPAC-CIAAW in 2005.

Density of Vapor and Liquid Pentafluorobenzene Along the Saturation Line

“…Random errors of T C and β are ±0.009 K and ±0.0035, respectively. The obtained value of the critical temperature agrees with the recommended value of T C = (530.9 ± 0.1) K [2], to within the estimated uncertainties. The present critical exponent value is practically equal to the β value of perfluorobenzene 0.343 ± 0.005 [3].…”

“…A knowledge of its properties is necessary for optimization of technological processes and carrying out of scientific calculations. Data on pentafluorobenzene density in a wide temperature range were obtained previously only for the liquid phase up to 490 K [1,2]. The critical density was defined by an extrapolation of the fitting equation for the saturated liquid density to the critical temperature.…”

SAFT-γ force field for the simulation of molecular fluids: 8. Hetero-segmented coarse-grained models of perfluoroalkylalkanes assessed with new vapour–liquid interfacial tension data

“…The predictions obtained from both relations are in very good mutual agreement, differing by less than 1.5% in all cases. It can be seen from Figure 3 that the estimated critical temperatures of the PFAAs exhibits less variation with chain length than for either the n-alkanes [113] or the perfluoro-n-alkanes [114]; the critical temperature of F 4 H 2 is quite close to that of n-hexane, while T c for F 4 H 6 is already lower than that of n-decane and perfluoron-decane. This behaviour is consistent with the vapour pressure data of PFAAs presented in previous work [75]: shorter PFAA molecules are more cohesive than the corresponding n-alkanes and perfluoro-n-alkanes presumably because the interactions between the permanent dipoles of the PFAAs are dominant.…”

Wagner liquid–vapour pressure equation constants from a simple methodology

“…Reliable data [6] are reported by Boublik et al [11]. These data can be correlated correctly by the Antoine equation whose parameters are found in the literature [ R: References (experimental data, critical properties) a: [21], b: [14], c: [6], d: [19], e: [24], f: [12], g: [23], h: [16], i: [22], j: [27], k: [26], l: [25]. data along the liquid-vapour saturation curve are used to solve equations (4) to (7), the resulting constants have to meet two conditions, viz.…”

“…Values for these two properties can be found in the literature for many pure substances [6,[12][13][14][15][16][17][18][19]. The constants A, B, C, and D are parameters in equation (1) and their optimum values are those that minimize the deviation in vapour pressure predictions.…”