First slide
Isomerism
Question

In the reaction [CoCl2(NH3)4]+ + Cl-  [CoCl3(NH3)3] + NH3.  Identify correct statement about the initial complex?

Moderate
Solution

Case 1 :Original complex is Cis

Cl- would replace an ammonia Cis to both or trans to one. Two isomers are formed.

Case 2:Original complex is trans 

Two chloride ions are trans to each other, all the other positions replaced are equivalent. Only one product is formed.

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