Title: stable radical
Long Title: IUPAC Gold Book - stable radical
DOI: 10.1351/goldbook.08970
Status: current

Definition
Mediating agent in stable-radical-mediated radical polymerization with sufficient kinetic stability such that it is essentially unreactive towards addition to monomer under the conditions of the experiment.

Note
The stable radical mediating agent need not be thermodynamically stable

Related Terms
- Mediating agent: https://goldbook.iupac.org//terms/view/08964
- chain activation: https://goldbook.iupac.org//terms/view/08941
- stable-radical-mediated radical polymerization: https://goldbook.iupac.org//terms/view/08921

Source
- PAC, 2022, 94, 1093. 'Terminology for chain polymerization (IUPAC Recommendations 2021)' on page 1125 (https://doi.org/10.1515/pac-2020-1211)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/08970/html
- json: https://goldbook.iupac.org/terms/view/08970/json
- xml: https://goldbook.iupac.org/terms/view/08970/xml

Citation: Citation: 'stable radical' 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.08970
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Accessed: 2026-06-21T19:44:04+00:00