Abstract
Solid + liquid phase diagrams have been obtained from cooling and warming curves for hexafluorobenzene + p-dioxane and + tetrahydrofuran. An incongruently melting solid addition compound forms with p-dioxane mixtures. No compound forms with tetrahydrofuran. Exploratory measurements show that no compound forms with hexafluorobenzene + tetrahydropyran or + 1,2-dimethoxyethane. The results suggest that compound formation results from a combination of favorable packing geometry and weak eletrostatic interactions rather than from charge-transfer.
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