GKFix MCQ Question

Why do the complexes [Co(NH3)6]^3+ and [CoF6]^3- exhibit different magnetic properties?

• A. Because they have different charges.
• B. Because NH3 and F- are different ligands.
• C. Because Co^3+ is paramagnetic.
• D. Because NH3 is a strong field ligand leading to a low-spin configuration, while F- is a weak field ligand leading to a high-spin configuration, resulting in different numbers of unpaired electrons.