Title: iminium ion
Long Title: IUPAC Gold Book - iminium ion
DOI: 10.1351/goldbook.12432
Status: current

Definition
Cation with the structure \(\ce{R2C=N^{+}R2}\).

Note
The terms imonium ion and immonium ion are irregularly formed and should not be used.

Source
- PAC, 2013, 85, 1515. 'Definitions of terms relating to mass spectrometry (IUPAC Recommendations 2013)' on page 1548 (https://doi.org/10.1351/PAC-REC-06-04-06)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/12432/html
- json: https://goldbook.iupac.org/terms/view/12432/json
- xml: https://goldbook.iupac.org/terms/view/12432/xml

Citation: Citation: 'iminium ion' 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.12432
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Accessed: 2025-11-01T05:25:25+00:00