Apparent molal volumes of aqueous solutions of bis-tetraalkylammonium salts at 25°C: Methylene-group contribution to the limiting molal volume |
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Authors: | Patrick Carpenter Siegfried Lindenbaum |
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Institution: | (1) Pharmaceutical Chemistry Department, University of Kansas, 66045 Lawrence, Kansas |
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Abstract: | Densities of aqueous solutions of a series of polymethonium chloride and bromide salts (CH3)3–N–(CH2)n–N–(CH3)3X2 have been measured at 25°C. Apparent molal volumes have been calculated, and methylene-group contributions to the limiting apparent molal volumes °v have been estimated. Constant values of the methylene-group contribution of 16.5 and 17.0 cm3-mole–1 were obtained for the bromide and chloride salts, respectively. These values are consistent with methylene-group contributions reported for other series of organic electrolytes. |
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Keywords: | Density apparent molal volume bolaform electrolytes bis-quaternary ammonium salts methylene-group contribution |
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