What is the coordination number of $Fe$ in $[Fe(CO)_5]$ and $[Fe(C_2O_4)_3]^{3-}$ respectively?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → 5 and 6
1. [Fe(CO)₅]
- CO is a monodentate ligand → donates 1 pair of electrons.
- There are 5 CO ligands.
Coordination number = 5
2. [Fe(C₂O₄)₃]³⁻
- C₂O₄²⁻ (oxalate) is a bidentate ligand → donates 2 pairs.
- There are 3 oxalate ligands.
Coordination number = 3 × 2 = 6