Which one of the following is an example of coordination isomerism?

Options

A. `[Co(NH_(3))_(6)][Cr(CN)_(6)] and [Cr(NH_(3))_(6)][Co(CN)_(6)]`
B. `[Co(NH_(3))_(3)(H_(2)O)_(2)Cl]Br_(2) and [Co(NH_(3))_(3)(H_(2)O)Cl*Br]Br*H_(2)O`
C. `[Pt(NH_(3))_(4)Cl_(2)]Br_(2) and [Pt(NH_(3))_(3)B_(2)]Cl_(2)`
D. `[Co(NH_(3))_(3)(CN)_(3)][Co(NH_(3))_(3)(CN)_(3)]`

Answer

A, D

Explanation

Coordination isomerism occurs when both cation and anion are complex, caused due to interchange of ligands between two complex ions of the same complex.