= Nonadiabatic transition state theory
{wiki=Nonadiabatic_transition_state_theory}
Nonadiabatic transition state theory (NA-TST) is an extension of traditional transition state theory (TST) that accounts for nonadiabatic effects during a chemical reaction. In classical transition state theory, reactions are modeled as proceeding over an energy barrier, with the transition state being a high-energy configuration that connects reactants to products. The assumption in TST is that the electronic states of the system remain unchanged (adiabatic) as nuclei move through the transition state.
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