The correct order of the calculated spin-only magnetic moments of complexes (A) to (D) is:
(A) Ni(CO)₄ (B) [Ni(H₂O)₆]Cl₂ (C) Na₂[Ni(CN)₄] (D) PdCl₂(PPh₃)₂

Question

The correct order of the calculated spin-only magnetic moments of complexes (A) to (D) is:
(A) Ni(CO)₄  (B) [Ni(H₂O)₆]Cl₂  (C) Na₂[Ni(CN)₄]  (D) PdCl₂(PPh₃)₂

Canvas Classes · Accepted Answer

Strategy:
 Calculate the magnetic moments for each complex by determining the number of unpaired d-electrons.

Step 1: Evaluate each complex
- (A) :  ()  diamagnetic, 0 unpaired.
- (B) :  () in an octahedral field always has 2 unpaired electrons () .
- (C) :  () with strong field  square planar (), all electrons paired  0 unpaired.
- (D) :  (). The high CFSE of the 4d series makes it a square planar, low-spin complex regardless of ligands.  0 unpaired.

Step 2: Compare
(A), (C), and (D) all have

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