Acid dissociation and spectrophotometric behaviour of 8-quinolineselenol in water-dioxan mixtures.
The arid dissociation constants of 8-quinolineselenol, 8-quinolinol and 8-quinolinethiol in water-dioxan mixtures of varying solvent composition were determined potentiometrically or spectro-photometrically. The absorption spectra of 8-quinolineselenol in the same solvents were also obtained. The acid dissociation phenomena, stability towards oxidation and the absorption spectra of the reagents are discussed in connection with the existing forms. It is verified that 8-quinolineselenol exists as a zwitterion in water-dioxan mixtures of low or high dioxan content.
Nakamura
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Department of Chemistry, Faculty of Science, Kobe University, Kobe, Japan.
Sekido
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E