Question

Jahn-Teller effect is not observed in high spin complexes of :

• A. $d^7$
• B. $d^9$
• C. $d^8$
• D. $d^4$

Answer 1

Answer: (C)

The John-Teller effect sometimes also known as John-Teller distortion, describes the geometrical distortion of molecules and ions that is associated with certain electron configurations.

The high spin complexes with d³, d⁵, d⁸, and d¹⁰ electrons that do no exhibit Jahn-Teller distortions. These electronic configurations correspond to a variety of transition metals.

Many common examples include Cr³⁺, Co³⁺, and Ni²⁺.

Hence option D is correct.