The number of complexes from the following with no electrons in the orbital is
, , , ,

Question

The number of complexes from the following with no electrons in the  orbital is 
, , , ,

Canvas Classes · Accepted Answer

Strategy:
 Identify the geometry of these complexes as tetrahedral. In a tetrahedral field, the lower set of d-orbitals is  and the higher set is . Find which complexes have a  configuration.

Step 1: Determine electron configurations
- :  (). Configuration is .
- :  (). Configuration is .
- :  (). Iron is in +6 oxidation state. Both electrons go into the lower  orbitals .
- :  (). Weak field  high spin .
- :  (). Weak field  high spin .

Step 2: Count the complexes
There are 3 complexes with 0

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