Also contains definition of: bond migration
The (usually intramolecular) transfer of an atom or group during the course of a molecular rearrangement.
The movement of a bond to a new position, within the same
is known as 'bond migration'. Allylic rearrangements, e.g.
exemplify both types of migration.
PAC, 1994, 66, 1077
(Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994))
on page 1141