{"term":{"id":"09614","title":"generation","longtitle":"IUPAC Gold Book - generation","doi":"10.1351\/goldbook.09614","code":"09614","status":"current","definitions":[{"id":1,"text":"Set of constitutional repeating units separated from the free valence of a dendron by the same number of constitutional repeating units.","notes":{"1":"Generations are numbered consecutively starting from the constitutional repeating unit bearing the free valence. Example of a four-generation dendron, highlighting constitutional repeating units of generations 1 to 4 and the end-groups. The preferred constitutional repeating unit is chosen such that the branch points are at its end in the dendron direction."},"contexts":[],"links":[{"term":"dendron","url":"https:\/\/goldbook.iupac.org\/terms\/view\/09611"}],"sources":["PAC, 2019, 91, 523. 'Nomenclature and terminology for dendrimers with regular dendrons and for hyperbranched polymers (IUPAC Recommendations 2017)' on page 530 (https:\/\/doi.org\/10.1515\/pac-2016-1217)"]}],"altoutputs":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/09614\/html","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/09614\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/09614\/plain"},"citation":"Citation: 'generation' 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.09614","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.","collection":"If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org .","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.","accessed":"2026-08-09T10:18:46+00:00"}}