Question

For which of the following configuration of octahedral complex(ex), cannot exist in both high spin and low spin forms?

This question has multiple correct options
A

B

C

D

Hard
Solution
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Correct options are A) and D)

When the outer electronic configuration of the central metal ion in the complex is   to  , the complex is inner orbital complex.
This is irrespective of the strength of the ligand field.
When the outer electronic configuration of the central metal ion in the complex is   to  , the complex is outer orbital complex.
This is irrespective of the strength of the ligand field.
Thus,   and  configuration of octahedral complex(es), cannot exist in both high spin and low spin forms.

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