Buchner, Richard and Hefter, Glenn (2002) Dielectric spectroscopy of cesium fluoride in methanol. JOURNAL OF SOLUTION CHEMISTRY, 31 (7). pp. 521-535. ISSN 0095-9782
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Dielectric relaxation spectra have been measured at frequencies up to 20 GHz for CsF solutions in methanol (MeOH) at concentrations up to about 1 mol-L at 25degreesC. Spectra were also obtained for a few concentrations of the much less soluble KF. The data show that CsF forms a solvent shared ion pair (SSIP) in MeOH solutions. Detailed consideration of the possible geometries and comparison with earlier conductometric data suggest that the ion pair involves an oriented solvent molecule located at a vertex of one of the coordination sites of the cesium, rather than a conventional SSIP. Solvation numbers of the ions, estimated via the modified Cavell equation, are unrealistically large. This suggests, consistent with the large dielectric decrement and the conductivity data, that the ions significantly break down the chain structure of MeOH.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | HIGH-FREQUENCY PERMITTIVITY; ELECTROLYTE-SOLUTIONS; ION-PAIR; RELAXATION; SOLVATION; 25-DEGREES-C; MIXTURES; LIQUIDS; KF; dielectric relaxation; complex permittivity; electrolyte solutions; solvation; ion association; relaxation time; cesium; fluoride; methanol |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie > Chair of Chemistry VI - Physical Chemistry (Solution Chemistry) > PD Dr. Richard Buchner |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 19 Oct 2021 05:06 |
| Last Modified: | 19 Oct 2021 05:06 |
| URI: | https://pred.uni-regensburg.de/id/eprint/40128 |
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