Which of the following complex will show geometrical as well as optical isomerism (en=ethylenediammine)

Which of the following complex will show geometrical as well as optical isomerism (en=ethylenediammine)
  1. $\left[\mathrm{Pt}\left(\mathrm{NH}_{3}ight)_{2} \mathrm{Cl}_{2}ight]$
  2. $\left[\mathrm{Pt}(\mathrm{en}) \mathrm{Cl}_{4}ight]$
  3. $\left[\mathrm{Pt}(\mathrm{en})_{3}ight]^{4+}$
  4. $\left[\mathrm{Pt}(\mathrm{en})_{2} \mathrm{Cl}_{2}ight]$

Solution

$\left[\mathrm{Pt}(\mathrm{en})_{2} \mathrm{Cl}_{2}ight]$ is a complex of the type $\left[\mathrm{M}(\mathrm{AA})_{2} \mathrm{~B}_{2}ight]$ which is octahedral. Such compounds exhibit optical and geometrical isomerism both.

Asked in: JEE-TOPICTESTS-CHEMISTRY

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