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MCQ Solution: Coordination Compounds

Set of d-orbitals which is used by central metal during formation of MnO⁴⁻

1) $$d_{x^2-y^2}, d_{z^2}, d_{xy}$$
2) $$d_{xy}, d_{yz}, d_{xz}$$
3) $$d_{x^2-y^2}, d_{xy}, d_{xz}$$
4) $$d_{x^2-y^2}, d_{z^2}, d_{xz}$$

Solution

Set of d-orbitals which is used by central metal during formation of $$MnO_4^-$$ is $$d_{xy}, d_{yz}, d_{xz}$$.
In spherical field of four oxide ligands, the five d orbitals are degenerate.
They split into $$t_{2g} and e_g$$ levels in tetrahedral field.
The three $$t_{2g}$$ orbitals mix with 4s orbital to form $$d^3s$$ hybrid orbitals.