Illustrated Glossary of Organic Chemistry

Cyclopentadienyl anion (cyclopentadienyl carbanion): An aromatic hydrocarbon carbanion of molecular formula C₅H₅^-. When bonded to a metal, this moiety is often abbreviated Cp, as in ferrocene.

Molecular Structure of the Cyclopentadienyl Anion

Kekule structure		Bond-line structure		Ball and spoke model		Space-filling model		Molecular model kit