Chemistry - Coordination Chemistry Question with Solution | TestHub

(A) Ionisation Isomerism

$[Cr(N{H}_3{)}_4(N{O}_2{)}_2]Br⟷[Cr(N{H}_3{)}_4(N{O}_2)Br]N{O}_2$

Exchange of coordinated ligand and counter ion is possible.

(B) Linkage Isomerism

$N{O}_2^{-}$ is an ambidentate ligand:

Nitro: $-N{O}_2$ (N-bonded)

Nitrito: $-ONO$ (O-bonded)

Hence, linkage isomerism occurs.

(C) Geometrical Isomerism

The complex is octahedral of type $M{A}_4{B}_2$, so it shows:

cis

trans

forms.

(D) Optical Isomerism

For $M{A}_4{B}_2$ octahedral complexes, neither the cis nor the trans form is chiral.

Hence, no optical isomerism.

$\boxed{Typesofisomerism:A,BandC}$

Answer: $\boxed{A,B,C}$.