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Influence of the molecular shape on the volumetric properties of mixtures. The excess volumes of hexafluorobenzene or fluorobenzene +an octane isomer

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Abstract

The excess volumes of C6F6 and C6H5F+an octane isomer (n-octane, cyclooctane, 2,2,4-trimethylpentane) have been measured at 25°C. The equimolar values increase from 2,2,4-trimethylpentane to n-octane to cyclooctane. The present results cannot be explained in terms of the scheme developed by Patterson for other alkane mixtures. Comparing the present results with others in the literature, the effect of the dipolar moment of the aromatic compound seems to be more complex than in previous studies of polar+non-polar components. The results have been analyzed in terms of two generalized van der Waals models, and a semiempirical equation of state. The results range from poor to fair.

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Authors and Affiliations

  1. Departmento de Química Física, Facultad de Químicas, Universidad Complutense, 28040, Madrid, Spain

    M. Reyes López Alañón, Mercedes Cáceres, Ramón G. Rubio & Javier Núñez

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  1. M. Reyes López Alañón
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  2. Mercedes Cáceres
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  3. Ramón G. Rubio
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  4. Javier Núñez
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López Alañón, M.R., Cáceres, M., Rubio, R.G. et al. Influence of the molecular shape on the volumetric properties of mixtures. The excess volumes of hexafluorobenzene or fluorobenzene +an octane isomer. J Solution Chem 19, 409–423 (1990). https://doi.org/10.1007/BF00648145

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  • DOI: https://doi.org/10.1007/BF00648145

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