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Coordination Compounds — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryCoordination Compounds3 Marks
Question
Explain Crystal field splitting in tetrahedral complax.
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Answer

→ In tetrahedral coordination entity formation, the d orbital splitting is inverted and is smaller as compared to the octahedral field splitting.
→ For the same metal, the same ligands and metal-ligand distances, it can be shown that $\Delta_t=(4 / 9) \Delta_0$.
→ The orbital splitting energies are not sufficiently large for forcing pairing and, therefore, low spin configurations are rarely observed.
Image
d orbital splitting in a tetrahedral crystal field.
→ The 'g' subscript is used for the octahedral and square planar complexes which have centre of symmetry.
→ Since tetrahedral complexes lack symmetry, 'g' subscrint is not used with energy levels
→ The energy of two e orbitals will decrease by $\frac{3}{5} \Delta t$ while that of three $t_2$ orbitals will increase by $\frac{2}{5} \Delta t$.

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