Related Experiment Video
Updated: Jun 18, 2026

A Guide to Concentration Alternating Frequency Response Analysis of Fuel Cells
Published on: December 11, 2019
Energy dynamics in theBray-Liebhafsky oscillatory reaction
1Faculty of Physical Chemistry, Studentski trg 12-16, P.O. Box 47, 11158 Belgrade, Serbia. Dragisa@ffh.bg.ac.rs
Abstract:
Energy dynamics of the well-stirred, isothermally conducted Bray-Liebhafsky reaction is followed by monitoring the population of the first two vibration states of hydrogen peroxide. Excitations are detected by Raman spectroscopy showing periodical changes of the energy flow through the system, matching the periodicity of chemical oscillations. Well before chemical oscillation, rearrangement of energy provokes excessive excitation of the first vibration state of hydrogen peroxide followed by the phase-shifted excitation of the second state. The observed populations of excited states highly exceed equilibrium values, suggesting that the nonequilibrium distribution of energy related to the peculiar hydrogen bond network dynamics may be an important part of the reaction mechanism.
Related Concept Videos
Thermal Electrocyclic Reactions: Stereochemistry
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.
Woodward–Hoffmann Selection Rules and Microscopic Reversibility
Reaction Mechanisms: The Steady-State Approximation
Fast Reactions
E2 Reaction: Kinetics and Mechanism
Energy Transfer in Chemical Reactions

