question_answer

Which one of the following complexes will have four different isomers?              [AIPMT 2000]

A) \[[Co{{(en)}_{2}}C{{l}_{2}}]Cl\]                      

B) \[[Co(en)(N{{H}_{3}})C{{l}_{2}}]Cl\]

C) \[[Co{{(PP{{H}_{3}})}_{2}}(N{{H}_{3}})C{{l}_{2}}]Cl\]                    

D) \[[Co{{(en)}_{3}}]C{{l}_{3}}\]

Correct Answer: B

Solution :

[b] Complex \[[Co\,(en)\,{{(N{{H}_{3}})}_{2}}C{{l}_{2}}]\text{ }Cl\] will have four different isomers.

(i) Geometrical isomers.

(ii) Optical isomers