Term: microcanonical variational transition-state theory  (µVTST)
https://doi.org/10.1351/goldbook.M03897

Definition:
A development of transition-state theory in which the dividing surface is varied so as to minimize the rate calculated for a fixed energy. The rate expressions obtained in a microcanonical treatment can be integrated over the energy, taking into account the statistical distribution over energy states, so as to give the canonical, or thermal, rates.

Related Terms:
1) transition-state theory (http://doi.org/10.1351/goldbook.T06470).
2) dividing surface (http://doi.org/10.1351/goldbook.D01823).

Source: PAC, 1996, 68, 149. 'A glossary of terms used in chemical kinetics, including reaction dynamics (IUPAC Recommendations 1996)' on page 173 (https://doi.org/10.1351/pac199668010149)

Citation: 'microcanonical variational transition-state theory  (µVTST)' 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.M03897

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