A
cyclopentadienyl complex is a
metal complex with one or more
cyclopentadienyl groups (C
5H
5-, abbreviated as Cp
-). Based on the type of bonding between the metals and the cyclopentadienyl moieties, cyclopentadienyl complexes are classified into the following three categories: a)
p-complexes, b)
s-complexes, and c)
ionic complexes.