Which complex has a higher crystal field splitting energy (Δo) with CN− ligands compared to NH₃ ligands?

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[Fe(NH₃)6]2+ [Ni(NH₃)6]2+ [Fe(CN)6]4− Correct [Co(NH₃)6]3+

[Fe(CN)6]4− has CN−, a stronger field ligand than NH₃, resulting in a larger Δo.

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