1974 Volume 3 Issue 9 Pages 983-986
The cis-[CrIII(CN)2en2]ClO4 complex gave rise to a two-stepped wave responsible for the reductions of Cr(III) to Cr(II) and to Cr(I) state at the dropping mercury electrode(DME) in dimethyl sulfoxide(DMSO). The reduction of the first step is reversible, while that of the second is quasi-reversible. The standard redox potential of the Cr(III)/Cr(II) couple was −1.586 V (vs. aq. SCE). In aqueous solutions containing 0.5 M Na2SO4 or acetate buffer, however, the cis-[Cr(CN)2en2]+ ion gave rise to only one irreversible wave for the reduction of Cr(III) to Cr(II) even in the presence of ethylenediamine in a large excess. Unlike the cases of cis-[Co(CN)2en2]+ and cis-[Co(CN)2dip2]+, the aquation of the resulting Cr(II) complex occurs so fast that a cyanide disproportionate reaction cannot be observed under such conditions.
This article cannot obtain the latest cited-by information.