Term: nucleophilic chain polymerization https://doi.org/10.1351/goldbook.08982 Definition: Chain polymerization in which the active centres are nucleophilic species. Note: Anionic polymerization is an example of nucleophilic chain polymerization. Example: Non-ionic nucleophilic species are nitrogen and sulfur lone pairs. Example: Array Source: PAC, 2022, 94, 1093. 'Terminology for chain polymerization (IUPAC Recommendations 2021)' on page 1129 (https://doi.org/10.1515/pac-2020-1211) Citation: 'nucleophilic chain polymerization' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.08982 License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms. Disclaimer: The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.