NEETChemistryCoordination CompoundsMCQ+4 / −1
Jahn-Teller effect is not observed in high spin complexes of
- Ad7
- Bd8
- Cd4
- Dd9
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Correct answer: B
Jahn-Teller distortion is generally significant for asymmetrically occupied eg orbitals as they are directed towards the ligands and the energy gain is more.
On the other hand in unevenly occupied t2g orbitals, the John-Teller distortion is very weak. Since the t2g orbitals does not point directly at the ligand and thus energy gain is less.

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