heterocumulenes

https://doi.org/10.1351/goldbook.H02797
Cumulenes in which one or more carbon atoms of the cumulative bond system have been replaced by heteroatoms. E.g. $\ce{O=C=C=C=O}$, but not $\ce{CH2=C=O}$, ketene, nor $\ce{O=C=O}$, carbon dioxide, which are heteroallenes.
Source:
PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1340 [Terms] [Paper]
Citation: 'heterocumulenes' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.H02797 RIS BibTex EndNote
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