question_answer

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

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

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

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

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

Correct Answer: B

Solution :

[b] 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.