A ligand exchange reaction, where the structural type of the metal complex remains the same. Although these types of reactions are not necessarily isodesmic reactions, a substantial degree of error cancellation for the calculated energy, Δ
E, is achieved because the coordination sphere of the metal atom
M is conserved.
Source:
PAC, 1999, 71, 1919. 'Glossary of terms used in theoretical organic chemistry' on page 1948 (https://doi.org/10.1351/pac199971101919)