Rationalizing the diverse solid-liquid equilibria of binary mixtures of benzene and its fluorinated derivatives

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Abstract

The solid liquid phase behavior of benzene plus hexafluorobenzene binary mixtures is characterized by a stable congruent-melting binary solid, (C6H6 center dot C6F6). In this work, differential scanning calorimetry (DSC) was used to build, for the first time, the temperature-composition phase diagrams of ten other binary mixtures involving benzene and its fluorinated derivatives. Distinct types of solid-liquid equilibria were observed, namely those exhibiting the usual eutectic behavior associated with ideal or quasi-ideal solubility conditions, or, in other cases, systems with equimolar congruent-melting solids. Data have been interpreted and rationalized using a unifying framework that takes into account the molecular dipole and quadrupole moments of the two components of each binary system and the structural motifs associated with each type of crystal.
Original languageUnknown
Pages (from-to)12589-12596
JournalJournal Of Physical Chemistry B
Volume114
Issue number39
DOIs
Publication statusPublished - 1 Jan 2010

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