Which of the following complex ions will exhibit optical isomerism? $(\mathrm{en}=1,2$ -diamine ethane $)$.

Which of the following complex ions will exhibit optical isomerism? $(\mathrm{en}=1,2$ -diamine ethane $)$.
  1. $\left[\mathrm{Cr}\left(\mathrm{NH}_{3}ight)_{2} \mathrm{Cl}_{2}ight]^{+}$
  2. $\left[\mathrm{Co}(\mathrm{en})_{2} \mathrm{Cl}_{2}ight]^{+}$
  3. $\left[\mathrm{Co}\left(\mathrm{NH}_{3}ight)_{4} \mathrm{Cl}_{2}ight]^{+}$
  4. $\left[\mathrm{Zn}(\mathrm{en})_{2}ight]^{2+}$

Solution

Non superimposable mirror images are called optical isomers and may be described as "chiral'. They are also called enantiomers and rotate plane polarised light in opposite directions.
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Asked in: JEE-TOPICTESTS-CHEMISTRY

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