Q57 / 180 · COMEDK 2023 (Memory Based) · Chemistry
Which of the following complex show optical isomerism?
(i) cis- $\left[\mathrm{COCl}(\mathrm{en})_2\left(\mathrm{NH}_3\right)\right]^{2+}$
(ii) cis- $\left[\mathrm{CrCl}_2(\mathrm{ox})_2\right]^{3-}$
(iii) cis- $\left[\mathrm{CO}(\mathrm{en})_2 \mathrm{Cl}_2\right] \mathrm{Cl}$
(iv) cis $\left\{\mathrm{CO}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right]^{+}$
- Correct answerA(i), (ii), (iii)
- B(i), (ii)
- C(i), (iv)
- D(i), (ii), (iv)
Solution
Octahedral complex having general formula $\left[M(A A)_2 a_2\right]^{n \pm}$ or $\left[M(A A)_2 a b\right]^{n \pm}$, shows optical isomersim.
cis- $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right]^{+}$does not show optical isomerism due to symmetry, while other three complexes show optical isomerism.
Hence, the correct answer is option: 'A'.