geminate pair

https://doi.org/10.1351/goldbook.G02602
Pair of
molecular entities
in close proximity in solution within a solvent
cage
and resulting from reaction (e.g. bond scission,
electron transfer
, group transfer) of a precursor that constitutes a single kinetic entity.
See also:
ion pair
,
radical pair
Source:
PAC, 1994, 66, 1077. (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1117 [Terms] [Paper]