The complexes `[Co(NH_3)_6][Cr(C_2O_4)_3]` and `[Cr(NH_3)_6][Co(C_2O_4)_3]` will have which type of isomerism

Options

A. Linkage isomerism
B. Geometrical isomerism
C. Coordination isomerism
D. Ionisation isomerism

Explanation

To determine the type of isomerism exhibited by the complexes `[Co(NH_3)_6][Cr(C_2O_4)_3]` and `[Cr(NH_3)_6][Co(C_2O_4)_3]`, we will analyze the coordination compounds step by step.

### Step 1: Identify the Components of the Complexes
The complexes consist of two metal ions and their respective ligands:
- In `[Co(NH_3)_6][Cr(C_2O_4)_3]`, cobalt (Co) is coordinated with six ammonia (NH₃) ligands, and chromium (Cr) is coordinated with three oxalate (C₂O₄) ligands.
- In `[Cr(NH_3)_6][Co(C_2O_4)_3]`, chromium is coordinated with six ammonia ligands, and cobalt is coordinated with three oxalate ligands.

### Step 2: Determine the Type of Isomerism
The two complexes differ in the arrangement of the metal ions and their ligands. This suggests that they may exhibit coordination isomerism.

Coordination isomerism occurs when the composition of the coordination sphere around the central metal ions differs, leading to different structures. In this case:
- The first complex has Co as the metal with NH₃ ligands and Cr with C₂O₄ ligands.
- The second complex has Cr as the metal with NH₃ ligands and Co with C₂O₄ ligands.

### Step 3: Conclusion
Since the two complexes have the same overall formula but differ in the arrangement of the ligands around the metal centers, they exhibit coordination isomerism.

### Final Answer
The complexes `[Co(NH_3)_6][Cr(C_2O_4)_3]` and `[Cr(NH_3)_6][Co(C_2O_4)_3]` exhibit coordination isomerism.

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