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Question: Answered & Verified by Expert
Among the following, the species that is both tetrahedral and diamagnetic is -
ChemistryCoordination CompoundsKVPYKVPY 2012 (SB/SX)
Options:
  • A $\left[\mathrm{NiCl}_{4}\right]^{2-}$
  • B $\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}$
  • C $\mathrm{Ni}(\mathrm{CO})_{4}$
  • D $\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}$
Solution:
2307 Upvotes Verified Answer
The correct answer is: $\mathrm{Ni}(\mathrm{CO})_{4}$
$\begin{array}{l}
{\left[\mathrm{Ni}(\mathrm{CO})_{4}\right]} \\
\mathrm{Ni}^{\circ}=3 \mathrm{~d}^{8} 4 \mathrm{~s}^{2} \\
\mathrm{CO}=\mathrm{SFL}, \mathrm{Ni}^{\circ}=3 \mathrm{~d}^{10} 4 \mathrm{~s}^{0}
\end{array}$

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