Abstract The Ce (III)-, Mn (II)-, or ferroin (Fe (phen) 3 2+)-catalyzed reaction of bromate ion and pyruvic acid (PA) or its dimer exhibits oscillatory behavior. Both the open-chain dimer (parapyruvic acid, γ-methyl-γ-hydroxyl-α-keto-glutaric acid, DPA1) and the cyclic-form dimer (α-keto-γ-valerolactone-γ-carboxylic acid, DPA2) show more sustained oscillations than PA monomer. Ferroin behaves differently from Ce (III) or Mn (II) ion in catalyzing these ...
