[18]annulene

chemical compound
ChemicalSubstance type_of_chemical_entity Q2702672
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[18]annulene

Summary

[18]annulene is a type of chemical entity[1]. [18]annulene ranks in the top 6% of type_of_chemical_entity entities by monthly Wikipedia readership (89 views/month).[2]

Key Facts

  • [18]annulene's instance of is recorded as type of chemical entity[3].
  • [18]annulene's canonical SMILES is recorded as C1=CC=CC=CC=CC=CC=CC=CC=CC=C1[4].
  • [18]annulene's chemical formula is recorded as C₁₈H₁₈[5].
  • [18]annulene is a type of annulene[6].
  • [18]annulene is a type of aromatic hydrocarbon[7].
  • [18]annulene's Commons category is recorded as Cyclooctadecanonaene[8].
  • [18]annulene's mass is recorded as {'unit': 'Q483261', 'amount': '+234.141'}[9].

Why It Matters

[18]annulene ranks in the top 6% of type_of_chemical_entity entities by monthly Wikipedia readership (89 views/month).[2] [18]annulene has Wikipedia articles in 7 language editions, a strong signal of global cultural recognition.[10] [18]annulene is known by 4 alternative names across languages and contexts.[11]

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). [18]annulene. Retrieved May 3, 2026, from https://4ort.xyz/entity/18-annulene
MLA “[18]annulene.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/18-annulene.
BibTeX @misc{4ortxyz_18-annulene_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{[18]annulene}}, year = {2026}, url = {https://4ort.xyz/entity/18-annulene}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): [18]annulene — https://4ort.xyz/entity/18-annulene (retrieved 2026-05-03)

Canonical URL: https://4ort.xyz/entity/18-annulene · Last refreshed:

Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 4w ago · Nabbegat · 2026-06-19 view diff on Wikidata ↗
    Instance of type of chemical entity
    Subclass of
    Aliases
    Subclass of annulene, aromatic hydrocarbon
    + 2 other properties edited (see Wikidata diff for full list)
    "/* wbeditentity-update-languages-short:0||tr */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/37300|batch #37300]]"
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