ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Belousov—Zhabotinskii reaction with the ethyl ester of 3-oxobutanoic acid in the presence of Mn(II)—Mn(III)

Ľ. Treindl and M. Mrákavová

Department of Physical Chemistry, Faculty of Natural Sciences, Komenský University, CS-842 15 Bratislava

Abstract: The kinetics of reduction of the Mn(III) ions by the ethyl ester of 3-oxobutanoic acid as well as the Belousov—Zhabotinskii reaction with this ester in the presence of Mn(II)—Mn(III) has been studied. The dependence of duration time of oscillations on the concentration of substrate is especially remarkable. It exhibits a distinct maximum at the concentration ratio of bromates to substrate q = 2.0. The results are discussed from the view-point of a simplified reaction model, the so-called oregonator. At values q>2.0 the oscillations vanish through a stage of chaotic behaviour while the oscillations disappear in the form of regular damped oscillations at q ≤2.0.

Full paper in Portable Document Format: 392a191.pdf

Chemical Papers 39 (2) 191–199 (1985)