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TS EAMCET · Chemistry · Coordination Compounds

Which of the following will have a spin only magnetic moment of 2.86 BM ?

  1. A \(\left[\mathrm{CoF}_6\right]^{3-}\)
  2. B \(\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}\)
  3. C \(\left[\mathrm{NiCl}_4\right]^2\)
  4. D \(\left[\mathrm{Ni}(\mathrm{CN})_4\right]^2\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(\left[\mathrm{NiCl}_4\right]^2\)

Step-by-step Solution

Detailed explanation

Nickel is in +2 oxidation state in the paramagnetic tetrahedral complex. \(\left[\mathrm{NiCl}_4\right]^{2-}\) and the ion has the electronic configuration \(3 \mathrm{~d}^8\). \(\mathrm{Ni}^{+2}=\left(3 \mathrm{~d}^8\right)=\)…