Cyclopentadienyl radical

Cyclopentadienyl radical
Names
	Preferred IUPAC name Cyclopenta-2,4-dien-1-yl
	Other names Cyclopentadienyl
Identifiers
CAS Number	2143-53-5;
3D model (JSmol)	Interactive image;
Beilstein Reference	2070324
ChEBI	CHEBI:36769;
ChemSpider	121110 ;
Gmelin Reference	323080
PubChem CID	137443;
CompTox Dashboard (EPA)	DTXSID00175702 ;
	InChI InChI=1S/C5H5/c1-2-4-5-3-1/h1-5H Key: HPYIUKIBUJFXII-UHFFFAOYSA-N ;
	SMILES [CH]1C=CC=C1;
Properties
Chemical formula	C5H5
Molar mass	65.095 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

In chemistry, cyclopentadienyl is a radical with the formula C₅H₅.

The cyclopentadienyl anion (formally related to the cyclopentadienyl radical by one-electron reduction) is aromatic, and forms salts and coordination compounds.

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