Question

The complex that has highest crystal field splitting energy(∆) is

(A) [Co(NH₃)₅(H₂O)]Cl₃ (B) K₂[CoCl₄]

(C) [Co(NH₃)₅Cl]Cl₂ (D) K₃[Co(CN)₆]

Answer 1

Answer:

square planar complexes

There is a large energy separation between the dz² orbital and the dxz and dyz orbitals, meaning that the crystal field splitting energy is large. We find that the square planar complexes have the greatest crystal field splitting energy compared to all the other complexes.

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