Perfluorocarbons dielectric constant

Highly fluorinated molecules have a nonpolar character and an extremely low polarizability, inducing only weak intra- and intermolecular interactions. As a consequence, perfluorocarbons behave almost like ideal liquids they are very compressible and have very high vapor pressure. For example, the physical properties of perfluoro-hexane, heptafluorohexane, and hexane are reported in Table 1.2 The effect of the polar character of the hemifluorinated compound (heptafluorohexane) on the dielectric constant value is remarkable. 

The density of the perfluorocarbons is usually more than twice that of their hydrocarbon counterparts. The low dielectric constants, surface/interface tensions and refractive indices of perfluorocarbons reflect their nonpolar character as liquids and solvents.6... 

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