Question

Which of the following complex will show largest splitting of $d$-orbitals?

• A. ${\left[F_e{\left(C_2{O}_4\right)}_3\right]}^{3-}$
• B. ${\left[F_e(CN{)}_6\right]}^{3-}$
• C. ${\left[F_e{\left(N{H}_3\right)}_6\right]}^{3+}$
• D. ${\left[F_e{F}_6\right]}^{3-}$

Answer 1

Answer: (B)

$\overline{C}N$ is a strong field ligand so maximum splitting in $d$ orbitals take place.