generalized transition-state theory 

https://doi.org/10.1351/goldbook.G02612
Any form of transition-state theory (TST), such as microcanonical variational TST, canonical variational TST, and improved canonical variational TST, in which the transition state is not necessarily located at the saddle point, is referred to as generalized transition-state theory.
Source:
PAC, 1996, 68, 149. (A glossary of terms used in chemical kinetics, including reaction dynamics (IUPAC Recommendations 1996)) on page 166 [Terms] [Paper]
Citation: 'generalized transition-state 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.G02612 RIS BibTex EndNote
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Last revised: February 24, 2014