Title: oxonium ylides
Long Title: IUPAC Gold Book - oxonium ylides
DOI: 10.1351/goldbook.O04379
Status: current

Definition
Compounds having the structure $\ce{R2O^{+}-C^{-}R2}$.See: ylidesA class of 1,3-dipolar compounds of general structure $\ce{R2C=O^{+}-Y^{-}}$, comprising carbonyl imides, carbonyl oxides and carbonyl ylides.

Related Terms
- carbonyl imides: https://goldbook.iupac.org//terms/view/C00845
- carbonyl oxides: https://goldbook.iupac.org//terms/view/C00847
- carbonyl ylides: https://goldbook.iupac.org//terms/view/C00848
- dipolar compounds: https://goldbook.iupac.org//terms/view/D01753
- ylides: https://goldbook.iupac.org//terms/view/Y06728

Source
- PAC, 1995, 67, 1307. 'Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)' on page 1355 (https://doi.org/10.1351/pac199567081307)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/O04379/html
- json: https://goldbook.iupac.org/terms/view/O04379/json
- xml: https://goldbook.iupac.org/terms/view/O04379/xml

Citation: Citation: 'oxonium ylides' 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.O04379
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Accessed: 2026-06-21T15:33:56+00:00