Physical and Chemical Properties of Pure Fluorocarbons

Abstract

THE vapor pressures of pure perfluoro-n-butane, perfluoromethylcyclohexane, perfluorodimethylcyclohexane, and perfluoro-n-heptane were determined.Heats and entropies of vaporization were calculated.Critical constants of perfluoro-n-butane, perfluoro-n-heptane, and perfluoromethylcyclohexane were evaluated, and boiling points, densities, refractive indices, surface tensions, and viscosities are given for a number of pure fluorocarbons. The behavior of some fluorocarbons towards hydrolysis was also studied.AFTER the preparation of a number of pure fluorocarbons by the method of synthesis described in previous papers of the current series (1), a demand for the determination of some of their

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

“…Their value was calculated using a very small set of the available data for perfluoro-n-alkanes. In our current work, we calculate the fluorine parachor contributions |P|(F) as a function of temperature using a much larger pool of literature data [88][89][90]116,[128][129][130][131], which includes that used by Sakka and Ogata. The molar densities used in the calculations are, whenever possible, those reported by the original authors.…”

Side chain fluorination and anion effect on the structure of 1-butyl-3-methylimidazolium ionic liquids

“…14 Another interesting aspect is the modification of macroscopic properties, thus perfluorination was observed to increase the density and viscosity of hydrocarbons, whereas vapor pressure was increased and boiling points are lowered despite the higher molecular weight. 13,29 The fluorous moiety itself shows a remarkable thermal stability and resistance towards oxidation. 13 Introducing fluorinated groups in ionic liquids can, therefore, lead to interesting modifications of properties.…”

Partially Fluorinated Esters and Ethers as Temperature Stable Liquids. Part I. Synthesis and Characterization

“…Refractivity values of fluorine were obtained by subtracting the customary increments from the observed LorentzLorenz molecular refr:,ction and dividing by the number of fluorine atoms. The resulting atomic refractivities vary, depending on the type of compound and the extent of the fluorine substitution, The Eisenlohr atomic refractivity of fluorine varies from 0.95 in monofluoroheptane to i.24 in perfluoroheptane (3,4). In the straight-chain compounds studied here, it varied from 1.18 to 1.29.…”

“…Production methods and properties of compounds prepared in this period are given in several survey papers (1)(2)(3)(4)(5)(6)(7)(8). An electrochemical process developed by Simons(9-1ý, is capable of producing not only fluorocarbons but also perfluoro acids, amines, and ethers.…”