Chemistry - Coordination Chemistry Question with Solution | TestHub

Question Explanation :

Identify the type of isomerism not possible for the given complex.

Concept:

Isomerism in octahedral complexes: geometrical, optical, ionization, hydrate.

Solution:

The complex is $[CrC{l}_2(H_{2}O{)}_2(N{H}_3{)}_2]Br$. This is an octahedral complex of the $M{A}_2{B}_2{C}_2$ type.

* Ionization isomerism: This is not possible because the anion ($B{r}^{-}$) is outside the coordination sphere and cannot exchange with a ligand inside.

* Hydrate isomerism: This is not possible because all water molecules are inside the coordination sphere; there is no water molecule outside that could exchange with a ligand.

* Geometrical isomerism: This is possible. Cis/trans isomers can exist with respect to the two $Cl$ ligands and the two $H_{2}O$ ligands.

* Optical isomerism: This is possible. The cis-form of the complex can be chiral, leading to enantiomers.

Final Answer: Option (B)