question_answer

Which of the following complex ions will exhibit optical isomerism? (en = 1,2-diamine ethane).     JEE Main Online Paper (Held On 12 May 2012)

A) \[{{[Cr{{(N{{H}_{3}})}_{2}}C{{l}_{2}}]}^{+}}\]      

B)                        \[{{[Co{{(en)}_{2}}C{{l}_{2}}]}^{+}}\]

C)                        \[{{[Co{{(N{{H}_{3}})}_{4}}C{{l}_{2}}]}^{+}}\]     

D)                        \[{{[Zn{{(en)}_{2}}]}^{2+}}\]

Correct Answer: B

Solution :

                Non super imposable mirror images are called optical isomers and may be described as "chiral'. They are also called enantiomers and rotate plane polarized light in opposite directions.