Q70 / 200 · NEET 2024 (Re-NEET) · Chemistry

Which of the following is not an ambidentate ligand?

  • Correct answer
    A
    $\mathrm{C}_2 \mathrm{O}_4^{2-}$
  • B
    $\mathrm{SCN}^{-}$
  • C
    $\mathrm{NO}_2^{-}$
  • D
    $\mathrm{CN}^{-}$

Solution

Ambidentate ligands are those ligands which have two different donor atoms and either of two donor atom is attached to the metal during complex formation. (1) $\mathrm{COO}^{-} \rightarrow \mathrm{M}$ has only one donor site through ' O '. So, it is not ambidentate. (2) $\mathrm{SCN} \rightarrow \mathrm{M}$ $\mathrm{NCS} \rightarrow \mathrm{M}$ (Ambidentate) Figure
Figure

Hence, the correct answer is option: 'A'.

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