Shape of $Fe{\left(CO\right)}_5$ is

In $Fe{\left(CO\right)}_5,$ the Fe-atom is in $ds{p}^3$ hybridised state, therefore the shape of molecule is trigonal bipyramidal The hybridisation is as follows:
${}_{26}Fe=1s^2,2s^{2}2p^6,3s^{2}3p^{6}3d^6,4s^{2}4p^0$
In presence of strong field ligand (CO), the electrons of 4s are pushed in 3d orbital and get paired up.
In $Fe{\left(CO\right)}_5,$ the Fe-atom is