Which of the following complex will show largest splitting of d-orbitals?

Question

Canvas Classes · Accepted Answer

Strategy:
 The magnitude of the crystal field splitting energy () primarily depends on the position of the ligand in the spectrochemical series when the metal ion is identical.

Step 1: Evaluate the ligands
The metal ion in all options is . We just need to compare the ligand field strengths of , , , and .
Spectrochemical series order:
Halides () < Oxygen donors () < Nitrogen donors () < Carbon donors ().

Step 2: Relate to splitting
Stronger field ligands cause a larger separation between the  a

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