anionotropic rearrangement (anionotropy)

https://doi.org/10.1351/goldbook.A00362
A @R05194@ in which the migrating group moves with its electron pair from one atom to another.
Source:
PAC, 1994, 66, 1077. (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1083 [Terms] [Paper]