Question

Ferrocene is

• A. $Fe \left(\eta^{5}- C _{5} H _{5}\right)_{2}$
• B. $Fe \left(\eta^{2}- C _{5} H _{5}\right)_{2}$
• C. $\operatorname{Cr}\left(\eta^{5}- C _{5} H _{5}\right)_{5}$
• D. $Os \left(\eta^{5}- C _{5} H _{5}\right)_{2}$

Answer 1

Answer: (A)

Ferroceneis an organometallic compound with the formula $Fe \left( \eta ^{5}- C _{5} H _{5}\right)_{2} .$ The molecule consists of two cyclopentadienyl rings bound on opposite sides of a central iron atom.