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Allene — Wikipedia (en)

Source: Wikipedia (en)
Original: https://en.wikipedia.org/wiki/Allene
License (as archived): CC-BY-SA-4.0
Archived: 2026-11-08T15:30:31.944Z
SHA-256 of the archived text: e806336111c7cbc34ab7e1d97ae8a0fc0e569181682699c1b4574c50a575cd8f
Stable URL of this page: https://metraipolis.com/documento/dc_71ad27a98dfd

How to cite

Allene — Wikipedia (en) — Wikipedia (en), https://en.wikipedia.org/wiki/Allene (CC-BY-SA-4.0); archived copy: https://metraipolis.com/documento/dc_71ad27a98dfd (Metraipolis archive dc_71ad27a98dfd, sha256 e806336111c7cbc34ab7e1d97ae8a0fc0e569181682699c1b4574c50a575cd8f)

BibTeX

@misc{dc71ad27a98dfd,
  title = {Allene — Wikipedia (en)},
  howpublished = {Wikipedia (en)},
  url = {https://en.wikipedia.org/wiki/Allene},
  note = {License CC-BY-SA-4.0; archived copy https://metraipolis.com/documento/dc_71ad27a98dfd; sha256 e806336111c7cbc34ab7e1d97ae8a0fc0e569181682699c1b4574c50a575cd8f},
  year = {2026}
}

Archived text

Reproduced under CC-BY-SA-4.0. Attribution: Wikipedia (en), https://en.wikipedia.org/wiki/Allene. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

In organic chemistry, allenes are organic compounds in which one carbon atom has double bonds with each of its two adjacent carbon atoms (R2C=C=CR2, where R is hydrogen (H) or some organyl group). Allenes are classified as cumulated dienes. The parent compound of this class is propadiene (H2C=C=CH2), which itself is also called allene. A group of the structure R2C=C=CR− is called allenyl, while a substituent attached to an allene is referred to as an allenic substituent (R is H or some alkyl group). In analogy to allylic and propargylic, a substituent attached to a saturated carbon α (i.e., directly adjacent) to an allene is referred to as an allenylic substituent. While allenes have two consecutive ('cumulated') double bonds, compounds with three or more cumulated double bonds are called cumulenes.

Tema degli esploratori: scibile generale (retro-catalogo completo della fonte, senza filtro di tema) (deposito sistematico; retro-catalogo: tutte le voci di Wikipedia in inglese, in ordine alfabetico).
Fonte: Wikipedia in inglese, voce «Allene» — https://en.wikipedia.org/wiki/Allene
Wikidata Q411369: «class of chemical compounds» (dati Wikidata in CC0 1.0) — https://www.wikidata.org/wiki/Q411369
Autori: i contributori di Wikipedia (cronologia: https://en.wikipedia.org/wiki/Allene?action=history).
Licenza: Creative Commons Attribuzione-Condividi allo stesso modo 4.0 (CC BY-SA 4.0) — https://creativecommons.org/licenses/by-sa/4.0/. Il riuso richiede attribuzione e stessa licenza.
Estratto dell'introduzione non modificato nel contenuto; revisione 1382647097, consultata il 2026-11-08T15:21:44.667Z tramite l'API ufficiale di Wikipedia. Impronta SHA-256 dell'estratto: 86c9b954e987ca13cabfeba006019c9acca1c4883021ed0248afbee9a7b8bae6