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Coordination Compounds — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryCoordination Compounds3 Marks
Question
Explain the following cases giving appropriate reasons:
  1. Nickel does not form low spin octahedral complexes.
  2. The $\pi$-complexes are known for the transition metals only.
  3. $Co^{2+}$ is easily oxidised to $Co^{3+}$ in the presence of a strong ligand.
✓

Answer

  1. Because two inner d-orbitals are not available in Ni.
  2. Because only d-electrons can be involved in ð-complex.
  3. Because crystal field splitting energy is more than compensated for the third ionisation enthalpy.

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