Question

What is the hybridisation of $Fe$ in $\left[Fe\right(CO{)}_4{]}^{-2}$?

• A. $d^{2}s{p}^3$
• B. $s{p}^3{d}^2$
• C. $s{p}^{3}d$
• D. $s{p}^3$

Answer 1

The correct option is A $d^{2}s{p}^3$

$\left[Fe\right(CO{)}_4{]}^{2-}$ As we know $CO$ is a neutral ligand. Therefore Fe has a $+2$ oxidation state. Electronic configuration of $F{e}^{+2}$ in the presence of strong field ligand is as follows:

$d^{2}s{p}^3$ is right answer.