An @E02035@ which proceeds via an intermediate species having a lifetime longer than a few rotational periods is known as a complex-@M03958@ reaction, or as an @I03011@.
Source: PAC, 1996, 68, 149. (A glossary of terms used in chemical kinetics, including reaction dynamics (IUPAC Recommendations 1996)) on page 160 [Terms] [Paper]
Citation: 'complex-mode reaction' 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.C01206 RISBibTexEndNote