Cyclopentadienone

Cyclopentadienone

Identifiers
CAS Number	13177-38-3
3D model (JSmol)	Interactive image
ChemSpider	122931
PubChem CID	139405
InChI InChI=1S/C5H4O/c6-5-3-1-2-4-5/h1-4H Key: FQQOMPOPYZIROF-UHFFFAOYSA-N InChI=1/C5H4O/c6-5-3-1-2-4-5/h1-4H Key: FQQOMPOPYZIROF-UHFFFAOYAD
SMILES C1=CC(=O)C=C1
Properties
Chemical formula	C5H4O
Molar mass	80.09 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Cyclopentadienone is an organic compound with molecular formula C₅H₄O. The parent cyclopentadienone is rarely encountered, because it rapidly dimerizes. Many substituted derivatives are known, notably tetraphenylcyclopentadienone. Such compounds are used as ligands in organometallic chemistry.