Editing Cyclopentadienyl complex (section)

{{Short description|Coordination complex of a metal and cyclopentadienyl groups}}
[[File:Zirconocene-dichloride-3D-sticks.png|thumb|right|200px|[[Zirconocene dichloride]], a '''cyclopentadienyl complex''']]

A '''cyclopentadienyl complex''' is a [[coordination complex]] of a [[metal]] and [[cyclopentadienyl anion|cyclopentadienyl groups]] ({{chem|C|5|H|5|−}}, abbreviated as '''Cp<sup>−</sup>'''). Cyclopentadienyl ligands almost invariably bind to metals as a [[hapticity|pentahapto]] (''η''<sup>5</sup>-) bonding mode.  The metal–cyclopentadienyl interaction is typically drawn as a single line from the metal center to the center of the Cp ring.<ref name=Elsch>Elschenbroich, C. "Organometallics" (2006) Wiley-VCH: Weinheim. {{ISBN|978-3-527-29390-2}}</ref><ref>{{cite book|first=A. |last=Yamamoto |date=1986 |title=Organotransition Metal Chemistry: Fundamental Concepts and Applications |location=New York, NY |publisher=Wiley-Interscience |page=105}}{{ISBN missing}}</ref>