The metal complex that is diamagnetic is: (Atomic number: Fe, 26; Cu, 29)

Question

Canvas Classes · Accepted Answer

Strategy:
 Check the -electron count for each metal to find which one has all its electrons paired (diamagnetic).

Step 1: Evaluate the complexes
- : Let the oxidation state of Cu be x. .
   has a fully filled  configuration. It has 0 unpaired electrons  Diamagnetic.
- :  (). Has 1 unpaired electron  Paramagnetic.
- :  (), low spin  1 unpaired electron  Paramagnetic.
- : formulation seems strange but it implies  (), high spin  4 unpaired electrons  Paramagnetic.

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