Abstract
Summary The effect of alkali metal ions on the polarographic reduction of dimeric copper(II) acetate in acetonitrile has been investigated. Copper(II) acetate in dilute LiClO 4 solution gives a current minimum at extremely negative potentials. The minimum disappears at high concentrations of LiClO 4 , and in dilute LiClO 4 solution containing n-Bu 4 NClO 4 . Copper(II) acetate in dilute NaClO 4 solution exhibits a distorted reduction wave with a peculiar shape of individual current-time curves over the whole potential region examined. A similar distorted wave was also observed in n-Bu 4 NClO 4 solution in the presence of small amounts of NaClO 4 . The distorted reduction wave disappears at high concentrations of NaCl 4 , and in dilute NaClO 4 solution containing small amounts of LiClO 4 . An interpretation of the phenomena is made on the basis of the adsorption of the film of lithium and sodium acetates formed at the mercury surface.
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