metallocene

From metallo- +‎ c(yclopentadi)ene. First used in ferrocene.

metallocene (plural metallocenes)

1. (organic chemistry) Any of a class of organic compounds containing two cyclopentadienyl anions and a transition metal whose bonding involves overlap of ns and np orbitals of the metal with molecular orbitals of appropriate symmetry of each cyclopentadienyl ring; the rings are parallel to each other, or sometimes canted.

• sandwich compound

metallocene m (plural metalloceni)

1. (chemistry) metallocene

• noce metella