Refractive indices and static permittivities of systems containing n-hexane or n-heptane and isomeric chlorobutanes

• Refractive indices of n-hexane or n-heptane with isomeric chlorobutanes have been measured.
• Static permittivities of the same mixtures have been also determined.
• From experimental data the corresponding excess properties have been calculated and correlated.
• Kirkwood correlation factors of the liquid mixtures have been estimated.

Refractive indices and static permittivities at temperatures of (283.15, 298.15, and 313.15) K and at pressure of 99.0 kPa were determined for the binary mixtures formed by n-hexane or n-heptane with isomeric chlorobutanes. Excess properties were obtained from the experimental values and correlated by means of a Redlich–Kister type equation. In addition, these results were used, together with available density values, to estimate at T = 298.15 K the Kirkwood correlation factors of the liquid mixtures. The behavior of this magnitude with composition was also discussed.

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