pre-equilibrium (prior equilibrium)

https://doi.org/10.1351/goldbook.P04810
A rapidly reversible step preceding the @[email protected] in a @[email protected] For example:
P04810.png
See also:
kinetic equivalence
Source:
PAC, 1994, 66, 1077. (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1152 [Terms] [Paper]
See also:
PAC, 1996, 68, 149. (A glossary of terms used in chemical kinetics, including reaction dynamics (IUPAC Recommendations 1996)) on page 177 [Terms] [Paper]