B. V. Tucker, J. M. Fitzgerald, L. G. Hargis
Apr 1, 1967
Citations
0
Influential Citations
8
Citations
Journal
Journal of Electroanalytical Chemistry
Abstract
Abstract Dichlorobis(2,2'-bipyridine)chromium.(III) chloride and tris (2,2'-bipyridine). chromium(III) perchlorate have been investigated using polarography and controlled. potential coulometry. In aqueous medium, neither complex underwent three simple one-electron reductions to the corresponding chromium(o) complex; reductions were complicated, and changes occurring on oxidation allowed 2,2'-bipyridine to be extracted from either complex. In one instance, reduction was complicated by a disproportionation reaction. Results indicated that, after reduction of either chromium(III) complex to the chromium(o) complex, the product of an oxidation by cerium(IV) or air was a bis(2,2'-bipyridine) chromium(III) complex from which one mole of 2,2'-bipyridine could be extracted. However, the polarographic and coulometric behaviour of the chromium(III) products from the two treatments differed considerably.