[Fe(CO)5] and [Ni(CN)6] do not show similarity in
Answer & explanation
Correct answer: option 1
The correct answer is option 1. participation of d-orbital in hybridization.
Hybridization of Fe in [Fe(CO)5] is dsp3 while hybridization of Ni in [Ni(CO)4] is sp3.
\([Fe(CO)_5]\)
\(CO\) is a strong field ligand hence pairing occurs.
\([Ni(CO)_4]\)
The electronic configuration of Ni is
\(Ni = _{18}Ar]4s^2 3d^8\)
After pairing
Hence, in \([Ni(CO)4]\), there is no participation of d-orbital in hybridization.