Which one of the following configuration will show Jahn-Teller distortion in an octahedral field? · ABC26IN0615
Subject: Inorganic Chemistry · Chapter: Coordination Chemistry · Topic: Coordination Compounds – General · Exam: JAM 2005-2022 · Marks: 2 · Difficulty: Medium
Which one of the following configuration will show Jahn-Teller distortion in an octahedral field?
(a)high spin $\mathrm{d}^{8}$
(b)high spin $\mathrm{d}^{4}$
(c)high spin $\mathrm{d}^{5}$
(d)low spin $\mathrm{d}^{6}$
Answer
Answer: B ✓ checked by 4AB · confidence high
Explanation
Strong Jahn–Teller distortion needs an unevenly filled e_g set: high-spin d⁴ (t₂g³e_g¹), low-spin d⁷ and d⁹. High-spin d⁸ (e_g²), d⁵ (all singly filled) and low-spin d⁶ (t₂g⁶) are symmetric.
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