question_answer

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

A)  \[cis\text{-}[pt\,\,{{(N{{H}_{3}})}_{2}}\,C{{l}_{2}}]\]

B)  \[trans\text{-}[Co\,\,{{(en)}_{2}}\,C{{l}_{2}}]\]

C)  \[trans\text{-}[Pt\,\,{{(N{{H}_{3}})}_{2}}\,C{{l}_{2}}]\]

D)  \[cis\text{-}[Co\,\,{{(en)}_{2}}\,C{{l}_{2}}]\]

Correct Answer: B

Solution :

Trans \[[CO\,{{(en)}_{2}}C{{l}_{2}}]\] is able to exhibit the phenomena of optical isomerism because it can form a superimposable mirror image.