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AP EAMCET · Chemistry · Coordination Compounds

Which of the following does not show optical isomerism?

  1. A \(\mathrm{Cis}-\left[\mathrm{Cr} \mathrm{Cl}_2\left(\mathrm{C}_2 \mathrm{O}_4\right)_2\right]^{3-}\)
  2. B \(\left[\mathrm{Pt} \mathrm{Cl}_2(\mathrm{en})_2\right]^{2+}\)
  3. C \(\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_3\left(\mathrm{NO}_2\right)_3\right]\)
  4. D \(\left[\mathrm{Co}(\mathrm{en})_3\right]^{3+}\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_3\left(\mathrm{NO}_2\right)_3\right]\)

Step-by-step Solution

Detailed explanation

To be optically active a molecule must not posses any one of the following symmetry elements. 1- Centre of symmetry 2- Plane of symmetry (POS)