migration

Also contains definition of: bond migration
https://doi.org/10.1351/goldbook.M03920
  1. The (usually @I03130@) transfer of an atom or @G02705@ during the course of a @M03997@.
  2. The movement of a bond to a new position, within the same @M03986@ is known as 'bond migration'. Allylic rearrangements, e.g.
    M03920.png
    exemplify both types of migration.
Source:
PAC, 1994, 66, 1077.(Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1141 [Terms] [Paper]