Basicity of saturated solutions of alkali metal hydroxides in dimethylsulfoxide
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Saturated solutions of alkali metal hydroxides in dimethyl sulfoxide are highly basic. The values of the acidity function H varied from 20.5 to 30.5 in going from LiOH to KOH.
The strong dependence of the basicity of the alkali-DMSO system on the nature of the cation is the result of an ion pair interaction in the solution which increases with a decrease in the radius of the cation and the varied drying capacity of the alkalis present in excess.
The KOH-DMSO pair is an example of the superbasic medium which is simplest to prepare and use; its basicity is located between potassium tert-butylate and potassium dimsyl in DMSO.
KeywordsPotassium DMSO Hydroxide Acidity Dimethyl
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