In conventional @T06470@ it is assumed that @A00092@ are formed in a state of equilibrium with the reactants. They are not in classical equilibrium with the reactants; if they were, addition of more activated complexes to the system would cause the equilibrium to shift in favour of the reactants. This would not occur for an @A00092@, and the term quasi-equilibrium is used to denote this special type of equilibrium.