long-lived collision complex

https://doi.org/10.1351/goldbook.L03622
When a potential-energy surface is such that the system performs a number of vibrations and rotations in the region of a
col
, the corresponding
intermediate
is known as a long-lived
collision complex
, and the reaction is said to be indirect.
Source:
PAC, 1981, 53, 753. (Symbolism and Terminology in Chemical Kinetics) on page 767 [Terms] [Paper]