For octahedral complex, which of the following $d^{n}$ configurations of metal cation cannot exist in high…
For octahedral complex, which of the following $d^{n}$ configurations of metal cation cannot exist in high spin and low spin forms?
$d^{3}$ and $d^{8}$
$d^{3}$ and $d^{5}$
$d^{3}$ and $d^{6}$
$d^{4}$ and $d^{8}$
Solution
In $d^{3}$ and $d^{8}$ octahedral complexes number of unpaired $\mathrm{e}^{-} \mathrm{s}$ at central metal atom/ion never changes, therefore for such octahedral complexes terms high spin and low spin not used.