Base-Catalyzed Oxidation of Carboxymethyl-cellulose Polymer by Permanganate.

The kinetics and mechanism of the disproportionation of MnO(4)(-) via [CMC-MnVIO(4)(2-)] intermediate complex formation during the oxidation of carboxymethyl-cellulose (CMC) polysaccharide have been investigated spectrophotometrically at pH>/=12 and various temperatures (15-35 degrees C). The rate law was suggested as rate=k(obs)[MnO(4)(-)]. Kinetic and spectrophotometric measurements revealed the base-catalyzed formation of manganate(VI) transient species. A mechanism was postulated consistent with the experimental data. Copyright 2001 Academic Press.