Carbohydrate Research p. 29 - 38 (1987)
Update date:2022-07-31
Topics:
Virtanen, Pentti O. I.
Lindroos, Raija
Oikarinen, Eija
Vaskuri, Juhani
The kinetics of the oxidation of D-galactose, D-glucose, D-mannose, D-fructose, L-sorbose, L-arabinose, D-ribose, and D-xylose with cerium(IV) in perchloric acid were studied.Two complexes were found to form in each case.The first complex forms in a pre-equilibrium reaction during mixing in the stopped-flow apparatus.Michaelis-Menten kinetics were observed for this oxidation.The values of the complex-formation and dissociation rate-constants were determined in 1.0 M HClO4.The dissociation partly involves the oxidation of the first complex and partly, the formation of a second, more-stable complex.This second complex is oxidized much more slowly than the first, and the values of the pseudo-first-order rate-constant were again determined in 1.0 M HClO4.The values proved to be almost constant in the range of 0.1 M to 1.0 M
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