Consider the complex ions,
trans- $\left[\mathrm{Co}(\mathrm{en})_2 \mathrm{Cl}_2\right]_{\sim}^{+}(\mathrm{A})$ and cis- $\left[\mathrm{Co}(\mathrm{en})_2 \mathrm{Cl}_2\right]_{\sim}^{+}(\mathrm{B})$. The correct statement regarding them is
Select the correct option:
A
both (A) and (B) can be optically active.
B
both (A) and (B) can not be optically active.
C
(A) can not be optically active, but (B) can be optically active.
D
(A) can be optically active, but (B) can not be optically active
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
Solution
trans- $\left[\mathrm{Co}(\mathrm{en})_2 \mathrm{Cl}_2\right]_{\sim}^{+}(\mathrm{A})$ contain a plane of symmetry. It cannot be optically active. Whereas, (B) cis- $\left[\mathrm{Co}(\mathrm{en})_2 \mathrm{Cl}_2\right]_{\sim}^{+}$does not contain any plane of symmetry. The compound (B) is optically active.
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