Moreno, Nicolas and Buchner, Richard and Vargas, Edgar F. (2015) Partial molar volume and isentropic compressibility of symmetrical and asymmetrical quaternary ammonium bromides in aqueous solution. JOURNAL OF CHEMICAL THERMODYNAMICS, 87. pp. 103-109. ISSN 0021-9614, 1096-3626
Full text not available from this repository. (Request a copy)Abstract
Values of apparent molar volume and isentropic compressibility of symmetric and asymmetric isomers of tetrabutylammonium bromide, namely tetra-n-butylammonium bromide, tetra-iso-butylammonium bromide, tetra-sec-butylammonium bromide, di-n-butyl-di-iso-butylammonium bromide and di-n-butyl-di-sec-butylammonium bromide, in aqueous solution were determined from density and speed of sound measurements. These properties were obtained as a function of molal concentration within the range of 0.01 < m/mol.kg(-1) < 0.1 covering temperatures from 278.15 <= T/K <= 293.15. The partial molar volumes and the apparent isentropic molar compressibility at infinite dilution were calculated and their dependence on temperature examined. The results show that cations with sec-butyl chains have larger structural volumes compared to those with iso-butyl chains. In addition, cations with sec-butyl chains induce smaller structural changes in their hydration shell than the others. (C) 2015 Elsevier Ltd. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | TETRAALKYLAMMONIUM HALIDES; ORGANIC SOLUTES; HEAT-CAPACITIES; ALKYLTRIMETHYLAMMONIUM BROMIDES; TETRABUTYLAMMONIUM BROMIDE; IONIC VOLUMES; WATER; APPARENT; SALTS; HYDRATION; Partial molar volumes; Isentropic compressibilities; Quaternary ammonium cations; Asymmetric cations |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 03 Jul 2019 13:13 |
| Last Modified: | 03 Jul 2019 13:13 |
| URI: | https://pred.uni-regensburg.de/id/eprint/5168 |
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