identity reaction

Synonym: degenerate chemical reaction
https://doi.org/10.1351/goldbook.I02940
A chemical reaction whose products are chemically identical with the reactants, for example the bimolecular self exchange reaction of CH3I with I.
See also: degenerate rearrangement
Source:
PAC, 1994, 66, 1077. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)' on page 1124 (https://doi.org/10.1351/pac199466051077)