Which of the following does not show optical isomerism?

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

Solution

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)

Asked in: AP EAMCET 2024 (18 May Shift 1)

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