Abstract
The reaction of bromate ion with malic acid in aqueous H2SO4 catalyzed by a tetraazamacrocyclic copper(II) complex exhibits oscillatory behavior. This complex contains an unsaturated macrocyclic ligand, 5,7,7,12,14,14-hexemethyl-1,4,8,11-tetraazacyclotetradeca-4,11-diene. The reactions were monitored both spectrophotometrically and potentiometrically. It was found that the oscillation period (tp) is dependent on the initial concentrations of malic acid or H2SO4 but is independent of the initial concentrations of NaBrO3. The experimental results indicate that acrylonitrile, H2O2, vitamin C, glucose or CCl4 present in the system can inhibit the oscillations. A tentative mechanism is proposed.
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Hu, G., Zhang, ZD., Hu, L. et al. A New Oscillating Reaction of the Belousov-Zhabotinskii-type with a Macrocyclic Copper(II) Complex as Catalyst. Transition Met Chem 30, 856–860 (2005). https://doi.org/10.1007/s11243-005-6259-5
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DOI: https://doi.org/10.1007/s11243-005-6259-5