single-step reaction

https://doi.org/10.1351/goldbook.S05691
A reaction that proceeds through a single transition state.
Source:
PAC, 1994, 66, 1077. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)' on page 1164 (https://doi.org/10.1351/pac199466051077)