Term: syndiotactic macromolecule https://doi.org/10.1351/goldbook.S06224 Definition: A tactic macromolecule, essentially comprising alternating enantiomeric configurational base units, which have chiral or prochiral atoms in the main chain (backbone) in a unique arrangement with respect to their adjacent constitutional units. Notes: 0) In a syndiotactic macromolecule, the configurational repeating unit consists of two configurational base units that are enantiomeric. 1) A syndiotactic macromolecule consists of @R05031@. Related Terms: 1) racemo diads (<em>in polymers</em>) (http://doi.org/10.1351/goldbook.R05031). 2) tactic macromolecule (<em>in polymers</em>) (http://doi.org/10.1351/goldbook.T06245). 3) configurational base units (<em>in polymers</em>) (<em>in polymers</em>) (http://doi.org/10.1351/goldbook.C01250). 4) main chain (backbone) (<em>in polymers</em>) (<em>in polymers</em>) (<em>of a polymer</em>) (http://doi.org/10.1351/goldbook.M03694). 5) constitutional units (<em>in polymers</em>) (<em>in polymers</em>) (<em>of a polymer</em>) (http://doi.org/10.1351/goldbook.C01288). 6) chiral (<em>in polymers</em>) (<em>in polymers</em>) (http://doi.org/10.1351/goldbook.C01057). Source: PAC, 1996, 68, 2287. 'Glossary of basic terms in polymer science (IUPAC Recommendations 1996)' on page 2292 (https://doi.org/10.1351/pac199668122287) Citation: 'syndiotactic macromolecule' 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.S06224 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.