{"term":{"id":"13967","title":"macromolecular pseudorotaxane","longtitle":"IUPAC Gold Book - macromolecular pseudorotaxane","doi":"10.1351\/goldbook.13967","code":"13967","status":"current","definitions":[{"id":1,"text":"Pseudorotaxane, at least one component of which is a macromolecule.","notes":{"1":"Structural differences between macromolecular pseudorotaxanes and macromolecular rotaxanes are neither substantial nor always obvious; macromolecular rotaxanes from which macromolecular component(s) can be dethreaded (i.e., the macromolecular rotaxane becomes a macromolecular pseudorotaxane) under some specific conditions are known. Therefore, the overwhelming majority of definitions concerning macromolecular rotaxanes are fully applicable also to macromolecular pseudorotaxanes after replacing the word \"rotaxane\" with the word \"pseudorotaxane\"; also, nomenclature rules are the same for both of these compound classes.","2":"A macromolecular pseudorotaxane in which only one end of a threading component is capped with a stopper is sometimes called a \"macromolecular semirotaxane\"."},"links":[{"term":"Pseudorotaxane","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/13972"},{"term":"macromolecular rotaxanes","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/13968"},{"term":"threading component","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/13985"}],"sources":["PAC, 2012, 84, 2135. 'Terminology and nomenclature for macromolecular rotaxanes and pseudorotaxanes (IUPAC Recommendations 2012)' on page 2138 (https:\/\/doi.org\/10.1351\/PAC-REC-11-10-15)"]}],"altoutputs":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/13967\/html","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/13967\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/13967\/plain"},"citation":"Citation: 'macromolecular pseudorotaxane' 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.13967","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":"2026-07-14T12:49:55+00:00"}}