Question

For which of the following $d^n$ configuration octahedral complex, cannot exist in both high spin and low spin forms

(I) $d^3$

(II) $d^5$

(III) $d^6$

(IV) $d^8$

• A. I, II and III
• B. II, III and IV
• C. I and IV
• D. None of these

Answer 1

Answer: (C)

Octahedral complexes having metal cation with $d^3$ and $d^8$ configuration cannot be defined in terms of high and low spin complex.