Cyclopentadienyl

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Cyclopentadienyl
Cyclopentadienyl-Anion.svg
Cyclopentadienyl anion
Identifiers
2070324
2143-53-5
ChEBI CHEBI:36769
ChemSpider 121110 YesY
323080
Jmol-3D images Image
Image
PubChem 137443
Properties
C5H5
Molar mass 65.09 g·mol−1
Except where noted otherwise, data is given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

In chemistry, cyclopentadienyl is commonly used for an anionic cyclic group of atoms with the formula C5H5. Cyclopentadienyl is closely related to cyclopentadiene, from which it can be formed by deprotonation. Cyclopentadienyl has five carbon atoms bonded together in a pentagonal planar ring, all five of which are bonded to individual hydrogen atoms. Cyclopentadienyl anion is chemically aromatic and shows equal bond lengths between carbon atoms in the ring.

Cyclopentadienyl is known in organometallic chemistry where it forms cyclopentadienyl complexes.

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