The complex that has highest crystal field splitting energy ∆ , is:

The complex that has highest crystal field splitting energy ∆ , is:
  1. K3CoCN6 
  2. CoNH35Cl  Cl2
  3. CoNH35H2OCl3  
  4. K2CoCl4

Solution

Strong field ligands have more CFSE value while weak field ligand have less CFSE value.

CN- is strongest ligand among all so K3CoCN6  has maximum CFSE value.

Asked in: JEE Main 2019 (09 Jan Shift 2)

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