Term: telomerization https://doi.org/10.1351/goldbook.T06260 Definition: The formation of an addition oligomer, having uniform end groups X' ... X" , by a chain reaction in which a chain transfer limits the length of the polymer ('telomer') produced. An example is the polymerization of styrene in bromotrichloromethane solution (X' = CCl3, X" = Br), where Cl3C· radicals are formed in the initiation step to produce Cl3C[CH2CHPh]nBr, with n greater than 1 and often less than ca. 10: T06260.png Related Terms: 1) oligomerization (http://doi.org/10.1351/goldbook.O04285). 2) oligomer (http://doi.org/10.1351/goldbook.O04283-1). 3) polymerization (http://doi.org/10.1351/goldbook.P04740). 4) initiation (http://doi.org/10.1351/goldbook.I03042). 5) telomer (http://doi.org/10.1351/goldbook.O04283-2). 6) chain reaction (http://doi.org/10.1351/goldbook.C00960). 7) chain transfer (http://doi.org/10.1351/goldbook.C00963). Image: Not defined (https://goldbook.iupac.org/img/inline/T06260.png) Source: PAC, 1994, 66, 1077. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)' on page 1173 (https://doi.org/10.1351/pac199466051077) Citation: 'telomerization' 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.T06260 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.