Which one of the following is expected to exhibit optical isomerism (en=ethylenediamine)?

Options

A. `Cis-[Pt(NH_(3))_(2)Cl_(2)]`
B. `Trans-[Co(en)_(2)Cl_(2)]^(+)`
C. `Trans-[Pt(NH_(3))_(2)Cl_(2)]`
D. `Cis-[Co(en)_(2)Cl_(2)]^(+)`

Answer

D

Explanation

`Cis-[Co(en)_(2)Cl_(2)]^(+)` is able to show the phenomenon of optical isomerism because it can form a superimposable mirror image.

It gives super imposable structure but trans-form is optically inactive