Title: activated monomer
Long Title: IUPAC Gold Book - activated monomer
DOI: 10.1351/goldbook.08936
Status: current

Definition
Reactive species generated reversibly from a monomer.

Note
Most frequently, the activated monomer is an anionic or cationic species.

Example
Deprotonated lactam, a protonated cyclic ether, and a Lewis acid coordinated lactone.

Related Terms
- activated-monomer polymerization: https://goldbook.iupac.org/terms/view/08907
- anion-activated-monomer polymerization: https://goldbook.iupac.org/terms/view/08989
- cation-activated-monomer polymerization: https://goldbook.iupac.org/terms/view/08990

Source
- PAC, 2022, 94, 1093. 'Terminology for chain polymerization (IUPAC Recommendations 2021)' on page 1114 (https://doi.org/10.1515/pac-2020-1211)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/08936/html
- json: https://goldbook.iupac.org/terms/view/08936/json
- xml: https://goldbook.iupac.org/terms/view/08936/xml

Citation: Citation: 'activated monomer' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.08936
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Accessed: 2026-08-10T12:34:44+00:00