WBJEE · Chemistry · Coordination Compounds
Which of the following statements is incorrect?
- A \(\left[\mathrm{VF}_6\right]^{3-}\) is paramagnetic with 2 unpaired electrons.
- B \(\left[\mathrm{CuCl}_4\right]^{2-}\) is paramagnetic with 1 unpaired electron.
- C \(\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}\) is diamagnetic.
- D \(\left[\mathrm{CoF}_6\right]^{3-}\) is paramagnetic with 2 unpaired electrons.
Answer & Solution
Correct Answer
(D) \(\left[\mathrm{CoF}_6\right]^{3-}\) is paramagnetic with 2 unpaired electrons.
Step-by-step Solution
Detailed explanation
Hint : \(\left[\stackrel{\text{III}}{\mathrm{Co}}\mathrm{F}_6\right]^{3-} \mathrm{As} \mathrm{F}^{-}\)is weak field ligand. Oxidation Number of \(\mathrm{Co}=+3\) \(\mathrm{Co}^{3+}\left(4 \mathrm{~s}^0 3 \mathrm{~d}^6\right)\) Number of unpaired \(\mathrm{e}^{-}=4\)
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