Q51 / 120 · NEET 2010 (Mains) · Chemistry

Which one of the following complexes is not expected to exhibit isomerism?

  • A
    $\left[\mathrm{Ni}\left(\mathrm{NH}_3\right)_4\left(\mathrm{H}_2 \mathrm{O}\right)_2\right]^{2+}$
  • B
    $\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}_2\right]$
  • Correct answer
    C
    $\left[\mathrm{Ni}\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}_2\right]$
  • D
    $\left[\mathrm{Ni}(\mathrm{en})_3\right]^{2+}$

Solution

$\left[\mathrm{Ni}\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}_2\right]$ has tetrahedral geometry and thus, does not exhibit isomerism due to presence of symmetry elements.

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

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