Cyclopentadienyl radical

Names
Preferred IUPAC name

Cyclopenta-2,4-dien-1-yl[1]

Other names

Cyclopentadienyl[1]

Identifiers

CAS Number

* 2143-53-5

3D model (JSmol)

* Interactive image

Beilstein Reference

| 2070324
ChEBI |

* CHEBI:36769

ChemSpider |

* 121110 Y

Gmelin Reference

| 323080

PubChem CID

* 137443

InChI

* InChI=1S/C5H5/c1-2-4-5-3-1/h1-5H Y

Key: HPYIUKIBUJFXII-UHFFFAOYSA-N Y

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

Tracking categories (test):

* SizeSet

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.

## See also

* Cyclopentadienyl anion, [C5H5]−
* Cyclopentadienyl cation, [C5H5]+
* Cyclopentadiene, C5H6
* Methyl radical, [CH3]•

## References

1. ↑ 1.0 1.1 Henri A. Favre; Warren H. Powell (2014). Nomenclature of Organic Chemistry : IUPAC Recommendations and Preferred Names 2013. Cambridge, England: The Royal Society of Chemistry. p. 1052. doi:10.1039/9781849733069. ISBN 978-0-85404-182-4.

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*[CID]: Compound ID