Vanadocene, bis(η5-cyclopentadienyl) vanadium, is the organometallic compound with the formula V(C5H5)2, commonly abbreviated Cp2V.

V(C5H5)2 is a metallocene, a class of organometallic compounds that typically have a metal ion sandwiched between two cyclopentadienyl rings.

[2] A modern synthesis of vanadocene that allows production in higher quantities requires treating [V2Cl3(THF)6]2[Zn2Cl6] with cyclopentadienylsodium.

[4] One reaction involves carbon monoxide, leading to an ionic vanadocene derivative when performed in inert atmosphere: Vanadocene is readily oxidized to the monocation when treated with a ferrocenium salt in toluene.

[5] These monocations are extremely air-sensitive and have a redox potential of -1.10 V.[5] Vanadocene reacts with high pressures of carbon monoxide to give CpV(CO)4.