Cyclopentadienyl

Cyclopentadienyl
Cyclopentadienyl anion
Systematic name Cyclopenta-2,4-dien-1-yl[1]
Other names Cyclopentadienyl radical[1]
Identifiers
CAS number	2143-53-5
PubChem	137443
ChemSpider	121110 Y
ChEBI	CHEBI:36769
Beilstein Reference	2070324
Gmelin Reference	323080
Jmol-3D images	Image 1 Image 2
SMILES c1cccc1 [CH]1C=CC=C1
InChI InChI=1S/C5H5/c1-2-4-5-3-1/h1-5H Y Key: HPYIUKIBUJFXII-UHFFFAOYSA-N Y
Properties
Molecular formula	C5H5
Molar mass	65.09 g mol−1
Exact mass	65.039125160 g mol-1
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

In organic chemistry, cyclopentadienyl is a cyclic group of atoms with the formula C₅H₅. Cyclopentadienyl are closely related to cyclopentadiene. Cyclopentadienyl have five carbon atoms bonded together in a pentagonal planar ring, all five of which are bonded to individual hydrogen atoms. Cyclopentadienyl is chemically aromatic and show equal bond lengths between carbon atoms in the ring.

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

References

1. ^ ^{a b} "cyclopentadienyl (CHEBI:36769)". Chemical Entities of Biological interest (ChEBI). UK: European Bioinformatics Instititute. https://www.ebi.ac.uk/chebi/searchId.do?chebiId=36769.