IUPAC definition : A molecular entity with a lifetime appreciably longer than a molecular vibration (corresponding
to a local potential energy minimum of depth greater than R T) that is formed (directly
or indirectly) from the reactants and reacts further to give (either directly or indirectly)
the products of a chemical reaction; also the corresponding chemical species.;
A molecular entity with a lifetime appreciably longer than a molecular vibration (corresponding
to a local potential energy minimum of depth greater than R T) that is formed (directly
or indirectly) from the reactants and reacts further to give (either directly or indirectly)
the products of a chemical reaction; also the corresponding chemical species.