In which complex t 2 g and e g orbitals both have symmetrical electronic dis | TestHub

Passage / Comprehension

Conditions for various types of distortion in octahedral complexes, according to the Jahn-Teller theorem, depend on the symmetric and unsymmetric electronic distribution of electrons in the t₂gand e_g orbitals:

(1) t₂g (symmetric) + e_g (symmetric) $\Rightarrow$ No distortion

(2) t₂g (unsymmetric) $\Rightarrow$ Slight distortion

(3) e_g (unsymmetric) $\Rightarrow$ Strong distortion

In which complex $t_{2 g}$ and $e_{g}$ orbitals both have symmetrical electronic distribution :-

Options:(select one or more)

Answer:

A, B

Solution:

(A) d⁸, $Δ_{0}$ < PE (high spin)

Configuration: $t_{2 g}^{6} e_{g}^{2}$ → $e_{g}$ has one electron in each orbital (symmetric) ⇒ no JT

(B) d⁸, $Δ_{0}$ > PE (low spin)

Configuration still $t_{2 g}^{6} e_{g}^{2}$ → same symmetric distribution ⇒ no JT

$t_{2 g}^{5} e_{g}^{2}$ → $t_{2 g}$ is uneven ⇒ distortion

(D) d⁷, $Δ_{0}$ > PE (low spin)

$t_{2 g}^{6} e_{g}^{1}$ → $e_{g}$ uneven ⇒ strong distortion

Final Answer: A, B

Chemistry - Coordination Chemistry Question with Solution | TestHub

Options:(select one or more)

Doubts & Discussion