https://doi.org/10.1351/goldbook.I03295
A chemical reaction, the principal product of which is
isomeric
with the principal reactant. An intramolecular
isomerization that involves the breaking or making of bonds is a special case of a molecular rearrangement
. Isomerization does not necessarily imply molecular rearrangement
(e.g. in the case of the interconversion of conformational isomers).