Abstract
Apparent molar volumes at infinite dilution of benzyltrimethylammonium bromide and its butyl and hexyl homologs at 15, 25, and 35°C and of dibenzyldimethylammonium bromide at 25°C in aqueous solution were estimated from density measurements. The additivity rule for the contribution of the methylene groups to the apparent molar volumes was found to be obeyed within a broad range of homologs, which covers the parent salt and the dodecyldimethylbenzylammonium bromide. The volumetric contribution of the phenylene (–C6H4–) group was estimated to be 61 cm3-mol−1 at 25°C. A value of −16.9 ± 0.3 cm3-mol−1 was suggested for the volumetric contribution of the N+ fragment to the apparent molar volume of alkylbenzyldimethylammonium salts.
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Tutaj, B., González-Pérez, A., Czapkiewicz, J. et al. Apparent Molar Volumes of Benzyltrimethylammonium Bromide and Its Homologs in Aqueous Solution at 15, 25, and 35°C. Journal of Solution Chemistry 30, 1101–1109 (2001). https://doi.org/10.1023/A:1014402102186
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DOI: https://doi.org/10.1023/A:1014402102186