Abstract

Abstract Cyclic voltammetry is used to study the electrochemical reduction of copper(II) triglycine complexes and the electrochemical reduction of a ternary copper(II)-diglycine-(2,9-dimethyl-1,10-phenanthroline) complex, Cu(H−1G2)dmp. The reduction of the copper(II) triglycine complexes at a hanging mercury drop electrode occurs via two-electrons to form copper amalgam. Under some conditions the dissociation of the copper(II) triglycine complexes to Cuaq 2+ is not sufficiently rapid to maintain diffusion control, and two reduction waves appear, one due to reduction of Cuaq 2+ and the other, appearing at more negative values than the first, due to reduction of a residual copper(II) triglycine complex. The reduction of the ternary complex CuII(H−1G2)dmp at a carbon paste electrode provides evidence of a transient copper(I) complex, CuI(H−1G2)dmp.

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