migration 

Also contains definition of: bond migration
https://doi.org/10.1351/goldbook.M03920
  1. The (usually intramolecular) transfer of an atom or group during the course of a molecular rearrangement.
  2. The movement of a bond to a new position, within the same molecular entity is known as 'bond migration'. Allylic rearrangements, e.g.
    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]
Citation: 'migration' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.M03920 RIS BibTex EndNote
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Last revised: February 24, 2014