Which of the following ligands is a strong field ligand? (2021) 2021

Which of the following ligands is a strong field ligand? (2021) 2021

Step 1: Understand what a ligand is. A ligand is a molecule or ion that can bond to a central metal atom to form a complex.
Step 2: Learn about strong field ligands. Strong field ligands are those that cause a large splitting of the d-orbitals in transition metals.
Step 3: Recognize the significance of d-orbital splitting. When d-orbitals split, it affects the electron arrangement and can lead to low-spin complexes, where electrons pair up in lower energy orbitals before occupying higher ones.
Step 4: Identify examples of strong field ligands. Common strong field ligands include CN- (cyanide), CO (carbon monoxide), and NH3 (ammonia).
Step 5: Compare the given ligands. If CN- is one of the options, it is a strong field ligand because it causes significant d-orbital splitting.

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