Ion Pair Formation in Solutions of Alkali Halides in Dimethyl Sulfoxide: Ultrasonic Absorption Studies

The ultrasonic absorption of dimethyl sulfoxide solutions of several alkali halides has been studied in the frequency range 1.5 to 52 MHz. An excess absorption, relaxing between 3 and 8 MHz, was observed. The relaxation was assigned to the final step in the stepwise formation of a contact ion pair,...

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Bibliographic Details
Published in:Canadian journal of chemistry 1971-10, Vol.49 (19), p.3107-3113
Main Authors: Dickson, D. R, Kruus, P
Format: Article
Language:English
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Summary:The ultrasonic absorption of dimethyl sulfoxide solutions of several alkali halides has been studied in the frequency range 1.5 to 52 MHz. An excess absorption, relaxing between 3 and 8 MHz, was observed. The relaxation was assigned to the final step in the stepwise formation of a contact ion pair, with the relaxation frequency controlled by the rate of movement of a solvent molecule rather than an ion. Data on the system water - dimethyl sulfoxide are also presented and the effect of water on the relaxation discussed.
ISSN:0008-4042
1480-3291
DOI:10.1139/v71-519