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TS EAMCET · Chemistry · Coordination Compounds

Among the following \(\mathrm{Cr}(\mathrm{III})\) complexes, which one will have the highest octahedral crystal field splitting?

  1. A \(\left[\mathrm{CrF}_6\right]^{3-}\)
  2. B \(\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}\)
  3. C \(\left[\mathrm{Cr}\left(\mathrm{NH}_3\right)_6\right]^{3+}\)
  4. D \(\left[\mathrm{Cr}(\mathrm{CN})_6\right]^{3-}\)
Verified Solution

Answer & Solution

Correct Answer

(D) \(\left[\mathrm{Cr}(\mathrm{CN})_6\right]^{3-}\)

Step-by-step Solution

Detailed explanation

A strong field ligand will enable higher crystal field splitting. It can be predicted from the relative position of a ligand in spectrochemical series. In the given octahedral complexes of \(\mathrm{Cr}(\mathrm{II})\) ion, the ligands are…