The region of a @P04780@ or hypersurface that corresponds to molecular configurations that are closer in geometry to those of the reactants than to those of the products.
Source: PAC, 1996, 68, 149. (A glossary of terms used in chemical kinetics, including reaction dynamics (IUPAC Recommendations 1996)) on page 165 [Terms] [Paper]
Citation: 'entrance channel' in IUPAC Compendium of Chemical Terminology, 3rd ed. International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. https://doi.org/10.1351/goldbook.E02148 RISBibTexEndNote