What is one limitation of the crystal field model regarding the nature of bonding between ligands and the central atom?

One limitation of the crystal field model (CFT) is its oversimplification of the nature of bonding between ligands and the central metal atom. CFT primarily focuses on the electrostatic interactions between metal d orbitals and ligands, neglecting covalent contributions to the metal-ligand bond. In reality, the bonding in coordination compounds often involves a combination of electrostatic interactions and covalent bonding. Ligands can donate electron density to metal orbitals, forming coordinate covalent bonds. The crystal field model does not adequately account for these covalent aspects, limiting its ability to provide a comprehensive description of the true nature of metal-ligand bonding in coordination complexes.