cyclopentadienyl

chemical compound; radical derivative of cyclopentadiene
ChemicalSubstance type_of_chemical_entity Q2209035
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cyclopentadienyl

Summary

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

Key Facts

  • cyclopentadienyl's instance of is recorded as type of chemical entity[3].
  • cyclopentadienyl's chemical structure is recorded as Cyclopentadienyl.svg[4].
  • cyclopentadienyl's CAS Registry Number is recorded as 2143-53-5[5].
  • cyclopentadienyl's canonical SMILES is recorded as C1=C[CH]C=C1[6].
  • cyclopentadienyl's InChI is recorded as InChI=1S/C5H5/c1-2-4-5-3-1/h1-5H[7].
  • cyclopentadienyl's InChIKey is recorded as HPYIUKIBUJFXII-UHFFFAOYSA-N[8].
  • cyclopentadienyl's chemical formula is recorded as C₅H₅[9].
  • cyclopentadienyl's subclass of is recorded as radical[10].
  • cyclopentadienyl's has part is recorded as carbon[11].
  • cyclopentadienyl's has part is recorded as hydrogen[12].
  • cyclopentadienyl's Freebase ID is recorded as /m/0gx0tb7[13].
  • cyclopentadienyl's ChemSpider ID is recorded as 121110[14].
  • cyclopentadienyl's PubChem CID is recorded as 137443[15].
  • cyclopentadienyl's ChEBI ID is recorded as 36769[16].
  • cyclopentadienyl's Encyclopædia Britannica Online ID is recorded as science/cyclopentadienyl[17].
  • cyclopentadienyl's Gmelin number is recorded as 323080[18].
  • cyclopentadienyl's Reaxys registry number is recorded as 2070324[19].
  • cyclopentadienyl's different from is recorded as cyclopentadienide[20].
  • cyclopentadienyl's Human Metabolome Database ID is recorded as HMDB0250665[21].
  • cyclopentadienyl's mass is recorded as {'unit': 'Q483261', 'amount': '+65.039'}[22].
  • cyclopentadienyl's SureChEMBL ID is recorded as 20738[23].
  • cyclopentadienyl's SureChEMBL ID is recorded as 6860481[24].
  • cyclopentadienyl's DSSTox substance ID is recorded as DTXSID00175702[25].
  • cyclopentadienyl's DSSTOX compound identifier is recorded as DTXCID9098193[26].
  • cyclopentadienyl's UniChem compound ID is recorded as 1099870[27].

Why It Matters

cyclopentadienyl ranks in the top 6% of type_of_chemical_entity entities by monthly Wikipedia readership (2 views/month).[2] cyclopentadienyl has Wikipedia articles in 5 language editions, a strong signal of global cultural recognition.[28] cyclopentadienyl is known by 3 alternative names across languages and contexts.[29]

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [3] . wikidata.org.
  2. [4] . wikidata.org.
  3. [5] . ChEBI. Retrieved . commonchemistry.cas.org. Provenance: wikidata.org.
  4. [6] . PubChem. Retrieved . wikidata.org.
  5. [7] . PubChem. Retrieved . wikidata.org.
  6. [8] . PubChem. Retrieved . wikidata.org.
  7. [9] . PubChem. Retrieved . wikidata.org.
  8. [10] . wikidata.org.
  9. [11] . wikidata.org.
  10. [12] . wikidata.org.
  11. [13] . wikidata.org.
  12. [14] . Q2311683. Retrieved . wikidata.org.
  13. [15] . PubChem. Retrieved . wikidata.org.
  14. [16] . ChEBI. Retrieved . wikidata.org.
  15. [17] . wikidata.org.
  16. [18] . wikidata.org.
  17. [19] . ChEBI. Retrieved . wikidata.org.
  18. [20] . wikidata.org.
  19. [21] . wikidata.org.
  20. [22] . PubChem. Retrieved . wikidata.org.
  21. [23] . wikidata.org.
  22. [24] . wikidata.org.
  23. [25] . Mapping file of InChIStrings, InChIKeys and DTXSIDs for the EPA CompTox Dashboard. wikidata.org.
  24. [26] . wikidata.org.
  25. [27] . UniChem. wikidata.org.

Class ancestry

  1. [1] . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] . Wikimedia Foundation. dumps.wikimedia.org.
  2. [28] . Wikidata sitelinks. wikidata.org.
  3. [29] . Wikidata aliases. wikidata.org.

📑 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). cyclopentadienyl. Retrieved May 3, 2026, from https://4ort.xyz/entity/cyclopentadienyl
MLA “cyclopentadienyl.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/cyclopentadienyl.
BibTeX @misc{4ortxyz_cyclopentadienyl_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{cyclopentadienyl}}, year = {2026}, url = {https://4ort.xyz/entity/cyclopentadienyl}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): cyclopentadienyl — https://4ort.xyz/entity/cyclopentadienyl (retrieved 2026-05-03)

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