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The hybridization and geometry of \(\mathrm{[NiCl_4]^{2-}}\) and \(\mathrm{[NiF_6]^{2-}}\) respectively are

Question and options

The hybridization and geometry of [NiCl4]2−\mathrm{[NiCl_4]^{2-}} and [NiF6]2−\mathrm{[NiF_6]^{2-}} respectively are
  1. sp3\mathrm{sp^3}, tetrahedral and d2sp3\mathrm{d^2sp^3}, octahedral
  2. dsp2\mathrm{dsp^2}, square planar and d2sp3\mathrm{d^2sp^3}, octahedral
  3. sp3\mathrm{sp^3}, tetrahedral and sp3d2\mathrm{sp^3d^2}, octahedral
  4. dsp2\mathrm{dsp^2}, square planar and sp3d2\mathrm{sp^3d^2}, octahedral

Answer and explanation

Correct answer: A - \(\mathrm{sp^3}\), tetrahedral and \(\mathrm{d^2sp^3}\), octahedral
[NiCl4]2−\mathrm{[NiCl_4]^{2-}}: Ni2+\mathrm{Ni^{2+}} d8\mathrm{d^8} with weak-field Cl−\mathrm{Cl^-}, sp3\mathrm{sp^3} tetrahedral (paramagnetic). [NiF6]2−\mathrm{[NiF_6]^{2-}}: Ni4+\mathrm{Ni^{4+}} d6\mathrm{d^6}, the high charge makes it low spin with inner-orbital d2sp3\mathrm{d^2sp^3} octahedral (diamagnetic).

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