https://doi.org/10.1351/goldbook.P04794
A step on the
In this mechanism the
reaction path
of some stepwise reactions
in which the molecular entity
C is already present in an encounter pair
or encounter complex
with A during the formation of B from A, e.g. ![Not defined](/img/inline/P04794.png)
chemical species
C may but does not necessarily assist the formation of B from A, which may itself be a bimolecular
reaction with some other reagent
. Pre-association
is important when B is too short-lived to permit B and C to come together by diffusion
.See also:
microscopic diffusion control
, spectator mechanism