Contribution to the Chemistry of the Belousov‐Zhabotinskii (BZ) Type Reactions

Abstract

Four new experimental observations are discussed which are difficult to interpret if we regard the bromide ion as a control intermediate of the BZ reaction. To explain the experimental facts two new hypothetical models: the bromine controlled (BC) model of the heterogeneous oscillations (substrate oxalic acid) and the Lotka‐Volterra (LV) model of the homogeneous oscillations with mixed substrate (oxalic acid‐aceton) are presented. Some variations of the more realistic LV model are mentioned.

Kinetics of the Acetaminophen-Based Oscillatory Chemical Reaction with and without Ferroin as Catalyst: An Inorganic Prototype Model for Acetaminophen–Ethanol Syndrome

“…It is the inhibition of the oxidation of acetaminophen as process C (i.e. regeneration of Brand reduction of metal ion catalyst) of FKN is taken over by Reaction (2) and the interaction of ethanol with many reactive intermediates like HBrO 2 , BrO 3 and HOBr that is responsible for the quenching of oscillations at higher concentrations of ethanol [58].…”

“…Cytochrome P450 is a haem protein containing iron as Fe(III) and ferroin in our system can be taken as its analogue, with the first part of Scheme 4 being similar to Reaction (2). HOBr in our system can be taken as the analogue of NADPH which is responsible for the conversion of NAPQI back to its reduced form (acetaminophen), so it is HOBr that is responsible for reduction of the oxidised product of acetaminophen in our system.…”

“…The Belousov-Zhabotinsky (BZ) reaction, the metal ion catalysed bromination of organic compounds by acidic bromate solutions, is the most widely and thoroughly studied oscillating chemical reaction [1,2]. The BZ reaction is a typical oscillatory reaction which comes under the purview of nonlinear chemical dynamics, i.e.…”

Dynamical equivalence and linear conjugacy of biochemical reaction network models

“…Being able to produce all the important qualitative dynamical properties like stable and unstable equilibria, multiple equilibria, bifurcation phenomena, oscillatory and even chaotic behaviour (Epstein and Pojman, 1998), CRNs "have become a prototype of nonlinear science" (Érdi and Tóth, 1989). Many of these phenomena have been actually observed in real chemical experiments where the practical constraints are much more severe than in the case of mathematical models (Noszticzius and Bódiss, 1980;Marlovits et al, 1995). This 'dynamical richness' of the model class explains that CRNs have attracted significant attention not only among chemists but in numerous other fields such as physics, or even pure and applied mathematics where nonlinear dynamical systems are considered.…”