reactive complex

https://doi.org/10.1351/goldbook.R05182
A species of very short life that occurs as an intermediate in a chemical reaction. An @[email protected] (or @[email protected]) is a special case.
Source:
PAC, 1996, 68, 149. (A glossary of terms used in chemical kinetics, including reaction dynamics (IUPAC Recommendations 1996)) on page 184 [Terms] [Paper]