{"term":{"id":"03315","title":"isotactic macromolecule","longtitle":"IUPAC Gold Book - isotactic macromolecule","doi":"10.1351\/goldbook.I03315","code":"I03315","status":"current","definitions":[{"id":1,"text":"A tactic macromolecule, essentially comprising only one species of configurational base unit, which has chiral or prochiral atoms in the main chain in a unique arrangement with respect to its adjacent constitutional units.","notes":{"1":"In an isotactic macromolecule, the configurational repeating unit is identical with the configurational base unit.","2":"An isotactic macromolecule consists of meso diads."},"links":[{"term":"chiral","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/C01057"},{"term":"configurational base unit","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/C01250"},{"term":"configurational repeating unit","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/C01253"},{"term":"constitutional units","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/C01288"},{"term":"main chain","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/M03694"},{"term":"meso diads","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/M03856"},{"term":"tactic macromolecule","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/T06245"}],"sources":["PAC, 1996, 68, 2287. 'Glossary of basic terms in polymer science (IUPAC Recommendations 1996)' on page 2292 (https:\/\/doi.org\/10.1351\/pac199668122287)"]}],"altoutputs":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/I03315\/html","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/I03315\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/I03315\/plain"},"citation":"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. 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.","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":"2026-06-04T00:04:03+00:00"}}