transition species
Any intermediate species in an @E02035@. An @A00092@ is an example of a transition species, but the latter term also includes other intermediate species. Transition species have also been called transition states, but there is then danger of confusion with a true @A00092@, which is also commonly known as a @T06468@.
PAC, 1996, 68, 149. (A glossary of terms used in chemical kinetics, including reaction dynamics (IUPAC Recommendations 1996)) on page 190 [Terms] [Paper]