Question

Why is CO a stronger ligand than Cl-?

Answer 1

The strength of a ligand is determined by the amount of crystal filed energy.Since, CO causes more crystal field splitting than Cl- , it has more crystal field energy and thus is astronger ligand than Cl -.

Answer 2

Hey dear,

● Explanation -
- The spectrochemical series is a list of ligands based on the strength of their interaction with metal ions.
- Spectrochemical series mentions CO to be a stronger ligand than Cl-.
- This can be explained by presence of both s & p characters in metal-carbon bond.
- Also carbonyl group shows backbonding which strengthens the bond between metal and ligand.
- Therefore, CO is stronger ligand than that of Cl-.

Hope this helps you...