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21 Jan - MorningJEE Main 2026

Compare the Hybridization and Geometry of: 1. [NiCl4]2−[NiCl_4]^{2-} 2. [Ni(CN)4]2−[Ni(CN)_4]^{2-} 3. [Ni(CO)4][Ni(CO)_4]

Expert Answer

  1. [NiCl4]2−[NiCl_4]^{2-} : sp3sp^3 , Tetrahedral (Paramagnetic) 2. [Ni(CN)4]2−[Ni(CN)_4]^{2-} : dsp2dsp^2 , Square Planar (Diamagnetic) 3. [Ni(CO)4][Ni(CO)_4] : sp3sp^3 , Tetrahedral (Diamagnetic) Pitfall: COCO is a strong ligand, but Ni(0)Ni(0) has no empty d-orbitals for dsp2dsp^2 .

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