{"term":{"id":"06200","title":"Swain–Lupton equation","longtitle":"IUPAC Gold Book - Swain–Lupton equation","doi":"10.1351\/goldbook.S06200","code":"S06200","status":"current","definitions":[{"id":1,"text":"A dual parameter approach to the correlation analysis of substituent effects, which involves a field constant (\\(F\\)) and a resonance constant (\\(R\\)). The original treatment was modified later. The procedure has been considerably applied, but also much criticized.","links":[{"term":"correlation analysis","url":"https:\/\/goldbook.iupac.org\/terms\/view\/C01346"},{"term":"resonance","url":"https:\/\/goldbook.iupac.org\/terms\/view\/R05326"}],"sources":["PAC, 1994, 66, 1077. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)' on page 1170 (https:\/\/doi.org\/10.1351\/pac199466051077)"]}],"altoutputs":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/S06200\/html","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/S06200\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/S06200\/plain"},"citation":"Citation: 'Swain–Lupton equation' 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.S06200","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":"2026-05-11T14:10:35+00:00"}}