Electrochemical behaviour of cuprous complexes of dithia-alkanedicarboxylic acids

M.M.J. Pieterse, L.J.J. Janssen

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    The composition and electrochemical behaviour of the cuprous complexes of dithia-alkanedicarboxylic acids viz., 2,5-dithiahexane-1,6-dicarboxylic acid (I); 3,6 dithiaoctane-1,8-dicarboxylic acid (II); 4,7-dithiadecane-1,10-dicarboxylic acid (III) and 2,2, 7,7-tetramethyl-3,6-dithiaoctane-1,8-dicarboxylic acid were investigated at a dropping mercury electrode. It was found that in alkaline solution two cuprous complexes exist viz. Cu3(L)8 and Cu3(L)16, but that in acid solution only one cuprous complex exists viz. Cu(L)2 where L is the ionised or un-ionised molecule of the complexforming acid. The stability of the complexes in both alkaline and acid solution were determined. Owing to either too low a stability or too small a solubility the determination of the diffusion coefficient and of the electrochemical parameters viz. reaction rate constant, transfer coefficient and activation energy, were not possible for all complexes. All electrochemical parameters mentioned were determined for the complexes of (II) only. It was found that bright Cu can be deposited from the solution on a solid electrode. For this the acid solution is the most useful electrolyte.
    Original languageEnglish
    Pages (from-to)365-376
    Number of pages12
    JournalJournal of Electroanalytical Chemistry and Interfacial Electrochemistry
    Issue number2
    Publication statusPublished - 1972


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