Title: electrical anharmonicity
Long Title: IUPAC Gold Book - electrical anharmonicity
DOI: 10.1351/goldbook.08591
Status: current

Definition
Influence of terms that are of \(2^{\rm{nd}}\) and higher order in the normal coordinate \(Q\) in the expansion of the electric dipole moment.

Note
Electrical anharmonicity should not be confused with mechanical anharmonicity.

Related Terms
- electrical harmonicity: https://goldbook.iupac.org//terms/view/08592
- mechanical anharmonicity: https://goldbook.iupac.org//terms/view/08635
- normal coordinate: https://goldbook.iupac.org//terms/view/08644

Source
- PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 744 (https://doi.org/10.1515/pac-2019-0203)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/08591/html
- json: https://goldbook.iupac.org/terms/view/08591/json
- xml: https://goldbook.iupac.org/terms/view/08591/xml

Citation: Citation: 'electrical anharmonicity' 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.08591
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Accessed: 2026-06-28T17:54:44+00:00