MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Inorganic ChemistryCoordination compoundsValence Bond Theory

Which one of the following is wrongly matched?

A.[Cu(NH3)4]2+ — Square planar

B.[Ni(CO)4] — Neutral ligand

C.[Fe(CN)6]3– — sp3 d2✓ Correct

D.[Co(en)3]3+ — Follows EAN rule

Explanation

As [Fe(CN)6]3– is an inner orbital octahedral complex therefore its hybridization will be d2sp3 instead of sp3d2 as pairing will take place because of the presence of a strong ligand. Therefore the correct answer will be (c).

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