and are respectively known as:

Question

and  are respectively known as:

Canvas Classes · Accepted Answer

Strategy:
 Correlate ligand strength with complex type referencing Valence Bond Theory terminology (outer vs inner orbital = spin free vs spin paired).

Step 1: Evaluate 
 () with a strong field ligand like  forces pairing against Hund's rule, filling the inner 3d orbitals and leaving no unpaired electrons. This uses  (inner orbital) hybridization. Since spins are paired, it's called a spin paired complex.

Step 2: Evaluate 
 () with a weak field ligand like  does not force pairing, resulting in

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