cage

https://doi.org/10.1351/goldbook.C00769
An aggregate of molecules, generally in the condensed phase, that surrounds the fragments formed, for example, by thermal or photochemical @D01801@. Because the cage hinders the separation of the fragments by @D01716@, they may preferentially react with one another ('@C00771@') but not necessarily to reform the precursor species. For example:
C00769.png
See:
cage effect
,
geminate recombination
Source:
PAC, 1994, 66, 1077. (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1091 [Terms] [Paper]