Title: field effect
Long Title: IUPAC Gold Book - field effect
DOI: 10.1351/goldbook.F02358
Status: current

Definition
An experimentally observable effect symbolized by \(F\) (on reaction rates, etc.) of intramolecular coulombic interaction between the centre of interest and a remote unipole or dipole, by direct action through space rather than through bonds. The magnitude of the field effect (or 'direct effect') depends on the unipolar charge/dipole moment, orientation of dipole, shortest distance between the centre of interest and the remote unipole or dipole, and on the effective dielectric constant.

Related Terms
- dielectric constant: https://goldbook.iupac.org/terms/view/D01697
- dipole moment: https://goldbook.iupac.org/terms/view/D01761
- electronic effect: https://goldbook.iupac.org/terms/view/E01996
- inductive effect: https://goldbook.iupac.org/terms/view/I03021
- intramolecular: https://goldbook.iupac.org/terms/view/I03130

Source
- PAC, 1994, 66, 1077. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)' on page 1115 (https://doi.org/10.1351/pac199466051077)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/F02358/html
- json: https://goldbook.iupac.org/terms/view/F02358/json
- xml: https://goldbook.iupac.org/terms/view/F02358/xml

Citation: Citation: 'field effect' 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.F02358
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Accessed: 2026-05-10T18:58:25+00:00