858451-26-0Relevant articles and documents
Oscillatory Chemical Reactions: Part V - Manganese Ion Catalysed Belousov-Zhabotinskii Reaction with Acetylacetone
Rastogi, R. P.,Rastogi, P.
, p. 1 - 6 (2007/10/02)
The oscillatory reaction in acetylacetone/KBrO3/Mn(+3)/H2SO4 system has been investigated. , and rate of temperature rise (dT/dt) are found to oscillate in phase.No pressure oscillations have been observed.Br(-), Br2, Mn(3+), MnO2, acetic acid and several bromo-derivatives are amongst the reaction products.Both Mn(3+) and BrO3(-) oxidise acetylacetone to acetic acid and pyruvic acid (?).The latter is easily brominated.No CO2 is produced in the reaction.However, in the present case, BrO3(-) is rapidly consumed by acetylacetone producing Br(-) ion which produces Br2 leading to rapid bromination reaction.Thermochemistry of component reactions has been investigated.Initiation time, time period, life time, amplitude and total number of cycles have been determined.Empirical relations between these parameters and concentrations of reactants and temperature have been obtained.
