15296 IUPAC Gold Book - polypyrrone 10.1351/goldbook.15296 15296 current synonyms: polybenzimidazolimides, polybenzimidazolones, polybenzimidazopyrrolones, polyimidazopyrrolones, polyisoindolobenzimidazole, polyisoindolobenzimidazoles 1 Polymer composed of single strand or ladder macromolecules comprising isoindolo[2,1-a]benzimidazole (formerly pyrrone) constitutional repeating units such as: where \(\ce{Z}\) is a divalent linking group or atom. Polypyrrones are also referred to as polybenzimidazolimides, polybenzimidazolones, polybenzimidazopyrrolones, polybenzoylenebenzimidazoles (usage strongly discouraged), polyimidazopyrrolones, and polyisoindolobenzimidazoles. Pyrrone is not an IUPAC approved name. PAC, 2009, 81, 1131. 'Glossary of class names of polymers based on chemical structure and molecular architecture (IUPAC Recommendations 2009)' on page 1164 (https://doi.org/10.1351/PAC-REC-08-01-30) https://goldbook.iupac.org/terms/view/15296/html https://goldbook.iupac.org/terms/view/15296/json https://goldbook.iupac.org/terms/view/15296/plain Citation: 'polypyrrone' 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.15296 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. If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org . 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. 2026-05-20T16:22:11+00:00