Ultrasonic absorption properties of solutions. Part 6.—Tetra-alkylammonium salts in water and tetra-n-butylammonium bromide in formamide, methylformamide and dimethylformamide
- 1 January 1968
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Transactions of the Faraday Society
- Vol. 64, 3247-3254
- https://doi.org/10.1039/tf9686403247
Abstract
The ultrasonic absorption properties over the range 1.5–230 MHz are reported for aqueous solutions containing tetra-methylammonium, tetra-ethylammonium, tetra-n-propylammonium and tetra-n-butylammonium bromides and tetra-n-butylammonium chloride. Solutions of tetra-n-butylammonium bromide in formamide, methylformamide and dimethylformamide have also been studied in this range. The relaxation curves for solutions containing tetra-n-butylammonium bromide have been analyzed using two relaxation frequencies. The marked similarities in the ultrasonic absorption properties of aqueous and non-aqueous solutions together with the detection of an absorption in this region for tetra-ethylmethane lead to the conclusion that the relaxations are basically a result of some form of rotational isomerism within the alkylammonium ion.Keywords
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