Title: Kamlet–Taft solvent parameters Long Title: IUPAC Gold Book - Kamlet–Taft solvent parameters DOI: 10.1351/goldbook.K03367 Status: current Definition Parameters of the Kamlet–Taft solvatochromic relationship which measure separately the hydrogen bond donor ($\ce{\upalpha\!}$), hydrogen bond acceptor ($\ce{\upbeta\!}$), and dipolarity/polarizability ($\ce{\uppi\!^{\ast}}$) properties of solvents as contributing to overall solvent polarity. Related Terms - hydrogen bond: https://goldbook.iupac.org//terms/view/H02899 - polarity: https://goldbook.iupac.org//terms/view/P04710 - polarizability: https://goldbook.iupac.org//terms/view/P04711 - solvatochromic relationship: https://goldbook.iupac.org//terms/view/S05748 Source - PAC, 1994, 66, 1077. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)' on page 1132 (https://doi.org/10.1351/pac199466051077) Other Outputs - html: https://goldbook.iupac.org/terms/view/K03367/html - json: https://goldbook.iupac.org/terms/view/K03367/json - xml: https://goldbook.iupac.org/terms/view/K03367/xml Citation: Citation: 'Kamlet–Taft solvent parameters' 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.K03367 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: 2026-05-20T11:55:22+00:00