pre-reactive complexes
Weakly bound complexes with a potential minimum that precedes the @A00093@ barrier along the @R05174@. In contrast with the van der Waals complexes, which fall apart reversibly into their constituents, the pre-reactive complexes may undergo a vigorous reaction to form different products.
PAC, 1999, 71, 1919. (Glossary of terms used in theoretical organic chemistry) on page 1958 [Terms] [Paper]