Rice–Ramsperger–Kassel (RRK) theory

abbreviation: RRK
https://doi.org/10.1351/goldbook.R05390
A theory of unimolecular gas reactions in which the rate with which the energized reactant molecule breaks down is treated as a function of the energy ε that it contains. The theory assumes that the rate is proportional to the number of ways of distributing ε among the internal degrees of freedom of the reactant molecule, in such a manner that the critical energy εc is localized in one particular degree of freedom.
Source:
PAC, 1996, 68, 149. (A glossary of terms used in chemical kinetics, including reaction dynamics (IUPAC Recommendations 1996)) on page 185 [Terms] [Paper]
Citation: 'Rice–Ramsperger–Kassel (RRK) theory' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.R05390 RIS BibTex EndNote
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