{"term":{"id":"02021","title":"electrophilicity","longtitle":"IUPAC Gold Book - electrophilicity","doi":"10.1351\/goldbook.E02021","code":"E02021","status":"current","definitions":[{"id":1,"text":"The property of being electrophilic (see electrophile).The relative reactivity of an electrophilic reagent. (It is also sometimes referred to as 'electrophilic power'.) Qualitatively, the concept is related to Lewis acidity. However, whereas Lewis acidity is measured by relative equilibrium constants, electrophilicity is measured by relative rate constants for reactions of different electrophilic reagents towards a common substrate (usually involving attack at a carbon atom).","links":[{"term":"Lewis acidity","url":"https:\/\/goldbook.iupac.org\/terms\/view\/L03509"},{"term":"electrophile","url":"https:\/\/goldbook.iupac.org\/terms\/view\/E02020"},{"term":"nucleophilicity","url":"https:\/\/goldbook.iupac.org\/terms\/view\/N04251"},{"term":"power","url":"https:\/\/goldbook.iupac.org\/terms\/view\/P04792"},{"term":"rate constants","url":"https:\/\/goldbook.iupac.org\/terms\/view\/R05138"},{"term":"reagent","url":"https:\/\/goldbook.iupac.org\/terms\/view\/R05190"},{"term":"substrate","url":"https:\/\/goldbook.iupac.org\/terms\/view\/S06082"}],"sources":["PAC, 1994, 66, 1077. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)' on page 1111 (https:\/\/doi.org\/10.1351\/pac199466051077)"]}],"altoutputs":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/E02021\/html","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/E02021\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/E02021\/plain"},"citation":"Citation: 'electrophilicity' 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.E02021","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":"2026-06-28T07:19:05+00:00"}}