Term: isotactic macromolecule
https://doi.org/10.1351/goldbook.I03315

Definition:
A tactic macromolecule, essentially comprising only one species of configurational base unit, which has chiral or prochiral atoms in the main chain (backbone) in a unique arrangement with respect to its adjacent constitutional units.

Notes:
0) In an isotactic macromolecule, the @C01253@ is identical with the configurational base unit.
1) An isotactic macromolecule consists of @M03856@.

Related Terms:
1) configurational repeating unit (<em>in polymers</em>) (http://doi.org/10.1351/goldbook.C01253).
2) meso diads (<em>in polymers</em>) (<em>in polymers</em>) (http://doi.org/10.1351/goldbook.M03856).
3) tactic macromolecule (<em>in polymers</em>) (<em>in polymers</em>) (http://doi.org/10.1351/goldbook.T06245).
4) configurational base unit (<em>in polymers</em>) (<em>in polymers</em>) (<em>in polymers</em>) (http://doi.org/10.1351/goldbook.C01250).
5) main chain (backbone) (<em>in polymers</em>) (<em>in polymers</em>) (<em>in polymers</em>) (<em>of a polymer</em>) (http://doi.org/10.1351/goldbook.M03694).
6) constitutional units (<em>in polymers</em>) (<em>in polymers</em>) (<em>in polymers</em>) (<em>of a polymer</em>) (http://doi.org/10.1351/goldbook.C01288).
7) chiral (<em>in polymers</em>) (<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: 'isotactic 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.I03315

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.