Engineering
Chemistry
Crystal Field Theory and Valence Bond Theory
Question

The complex that has highest crystal field splitting energy (Δ), is:

K2[CoCl4]

[Co(NH3)5Cl]Cl2

[Co(NH3)5(H2O)]Cl3

K3[Co(CN)6]

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Solution

As CN– is a strong field ligand. K3[Co(CN)6] will have maximum ‘Δ’.