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Chemistry - Coordination Chemistry Question with Solution | TestHub

ChemistryCoordination ChemistryVBT,CFT(complex compound)Medium2 minQB

ChemistryMediumsingle choice

Passage / Comprehension

The Jahn – Teller theorem states that any non-linear molecular system in a degenerate electronic state tends to undergo distortion to remove degeneracy and lower its energy.

In which system Jahn Teller distortion is not observed in low spin complex but weak distortion is observed in high spin complex.

Options:

Answer:

Solution:

$d^{6}$ octahedral, low spin: $t_{2 g}^{6} e_{g}^{0}$ - both sets symmetrically filled, so no Jahn-Teller distortion.

$d^{6}$ octahedral, high spin: $t_{2 g}^{4} e_{g}^{2}$ - $e_{g}^{2}$ is symmetric but $t_{2 g}^{4}$ is unsymmetrically occupied, giving only a weak distortion.

Answer: (A)

Stream:JEESubject:ChemistryTopic:Coordination ChemistrySubtopic:VBT,CFT(complex compound)

⏱ 2mℹ️ Source: QB

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