Solid Compound Formation in the CCl₄ Mixtures of p-Dioxane with CCl₄, CBrCl₃, and CFCl₃. Solid-Liquid Phase Equilibria in Binary and CFCl₃ Systems.

Abstract

Solid-liquid phase diagrams have been obtained from time-temperature cooling curves for the three binary systems formed from p-dioxane with CCL, CFCL, and CBrCL. Solid compounds with the empirical formulas of P-C4I-LO2 • (CCL) _ and P-C4H8O2 (CFCIO2 were formed. The system p-CtH^-CBrCL shows a maximum freezing point in a solid solution, but the evidence is against compound formation in that system.Exploratory measurements on the CHgCCL-dioxane and (CH3)3-CCt-dioxane systems show that they do not form compounds. These results are in qualitative agreement with the concept that p-dioxane is acting as an electron donor and the halogenated molecules as acceptors in the intermolecular compounds.

Densities and Excess Molar Volumes of the Ternary System (1,4-Dioxane + 2-Propanol + 1,1,2,2-Tetrachloroethane) at T = 288.15–318.15 K and at Atmospheric Pressure: Experimental Measurements and Prigogine–Flory–Patterson Modeling

“…So, the negative V E values, presented by the 1,4-dioxane + 1,1,2,2-tetrachloroethane mixture, over the whole composition and working temperature ranges is due to the predominance of the negative contribution to V E , which results from specific intermolecular interactions between unlike molecules in this mixture. It should be pointed out that this behavior was reported for mixtures of 1,4-dioxane with numerous chloroalkanes by several other authors. ,,− The sigmoidal V E curves observed in Figure for 2-propanol + 1,1,2,2-tetrachloroethane mixture result from the balance between two main contributions to V E values. First is a positive contribution probably due to the break-up of associates in the pure state, such as the self-association in the pure alcohol and dipole–dipole in the chloroalkane, which is more significant in the chloroalkane-rich region.…”

Solid-Liquid Phase Equilibria in Binary Mixtures of Silicon Tetrachloride, Silicon Tetrabromide, and Tin Tetrachloride with Benzene, p-Xylen, and p-Dioxane.

“…The similarities in the tetrahalides of C, Si, and Sn suggested the present investigation of the solid-liquid phase properties of SiCl4, SiBr4, and SnCl4 with benzene, p-xylene, and p-dioxane. Furthermore, the temperature of the meritectic halt for the 1:4 solid compound of SiBr4 with p-dioxane described by Kennard and McCusker (7) coincides closely enough with the solid phase transition in -p-dioxane described in previous reports (11,4) that we felt it advisable to reinvestigate the phase equilibria in this system.…”

“…The method for purification of the aromatic compounds and the dioxane have been previously described (10,11). The SiCl4 was fractionally distilled in a 170 cm.…”

Further Development of Modified UNIFAC (Dortmund): Revision and Extension 6

“…Experimental VLE, SLE, h E , and calculated results obtained from a simultaneous fit to three group combinations simultaneously: 42 (cy-CH 2 ) and 67 (CFCl 2 ), 43 (cy-CH 2 O) and 67 (CFCl 2 ), 43 (cy-CH 2 O) and 70 (CF 2 Cl 2 ).…”