Which coordination polyhedron does [Ni(CO)₄] adopt?

Question

Accepted Answer

D. {'text': 'Tetrahedral', 'label': 'D'}

1. NCERT explicitly gives [Ni(CO)₄] as an example of a tetrahedral complex.
2. Ni(0) with 4 CO ligands has d¹⁰ configuration.
3. CO is a strong-field ligand, but Ni(0) in [Ni(CO)₄] is tetrahedral in geometry.
4. [PtCl₄]²⁻ (d⁸) is square planar; [Co(NH₃)₆]³⁺ (d⁶) is octahedral.
_Source: NCERT Class 12 Chemistry, Unit 5 "Coordination Compounds", §5.2(f)_

Answer

{'text': 'Octahedral', 'label': 'A'}

Answer

{'text': 'Square planar', 'label': 'B'}

Answer

{'text': 'Trigonal bipyramidal', 'label': 'C'}