Which mechanism explains why certain metal complexes with partially filled d-orbitals exhibit strong optical absorption bands?

💡 Explanation

When metal complexes contains ligands, ligand field splitting occurs because ligands electrostatically interact and change the relative energies of the originally degenerate d-orbitals, creating energy gaps that match visible light frequencies. Therefore ligand field transitions result in strong absorption, rather than vibrational relaxation, stark effect or Fermi's Golden rule that rely on different physical properties.

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