State the limitations of crystal field theory $(CFT)$.
(N/A) Although the crystal field theory $(CFT)$ successfully explains the formation of structures,color,and magnetic properties of coordination compounds,it has the following limitations:
$1$. $CFT$ is based on an electrostatic model where metal ions and ligands are assumed to be point charges. Hence,it cannot explain the covalent character of the metal-ligand $(M-L)$ bond.
$2$. Anionic ligands are assumed to be point charges and thus should exert the maximum splitting effect. However,in reality,anionic ligands are found at the low end of the spectrochemical series.
$3$. It does not account for the $\pi$-bonding in complexes.
$4$. The limitations of $CFT$ are addressed by Ligand Field Theory $(LFT)$ and Molecular Orbital Theory $(MOT)$.
$1$. $CFT$ is based on an electrostatic model where metal ions and ligands are assumed to be point charges. Hence,it cannot explain the covalent character of the metal-ligand $(M-L)$ bond.
$2$. Anionic ligands are assumed to be point charges and thus should exert the maximum splitting effect. However,in reality,anionic ligands are found at the low end of the spectrochemical series.
$3$. It does not account for the $\pi$-bonding in complexes.
$4$. The limitations of $CFT$ are addressed by Ligand Field Theory $(LFT)$ and Molecular Orbital Theory $(MOT)$.
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