Incorrect match for give complex compound/ion and its characteristics

Options

A. `[CrBrCl(en)_2]Br,` lonization and optical isomerism
B. `[CoBr_3(H_2O)_3]` , Fac - mer and hydrate isomerism
C. `[Pt Cl_2(NH_3)_4][Co(SCN)_4]` , Linkage isomerism and paramagnetic character
D. `[Co("ox")_3]^(3-)` , Inner orbital complex and optical isomerism

Answer

To solve the question of identifying the incorrect match for the given complex compound/ion and its characteristics, we will analyze each option step by step.

### Step 1: Analyze Option 1
**Complex:** CrBrCl(en)₂
**Characteristics:** Ionization isomerism and optical isomerism

- **Ionization Isomerism:** This occurs when the complex can form different ions in solution. In this case, the bromide (Br) and chloride (Cl) can exchange positions with ethylenediamine (en), leading to different ionic forms.
- **Optical Isomerism:** Since the complex lacks symmetry due to the presence of two different ligands (Br and Cl) and the bidentate nature of en, it can exist as non-superimposable mirror images.

**Conclusion:** This option is correct.

### Step 2: Analyze Option 2
**Complex:** CoBr₃(H₂O)
**Characteristics:** Hydrate isomerism

- **Hydrate Isomerism:** This type of isomerism occurs when water molecules are present in the coordination sphere of the complex. In this case, the complex does not have H₂O as a ligand, which means it cannot exhibit hydrate isomerism.

**Conclusion:** This option is incorrect.

### Step 3: Analyze Option 3
**Complex:** PtCl₂(NH₃)₄
**Characteristics:** Paramagnetism and linkage isomerism

- **Paramagnetism:** The oxidation state of platinum in this complex is +4, and since NH₃ is a strong field ligand, it will pair all electrons, resulting in a diamagnetic complex, not paramagnetic.
- **Linkage Isomerism:** This occurs when a ligand can bind to the metal in different ways. In this case, there is no indication that linkage isomerism is applicable here.

**Conclusion:** This option is incorrect.

### Step 4: Analyze Option 4
**Complex:** Co(ox)₃³⁻
**Characteristics:** Inner orbital complex and optical isomerism

- **Inner Orbital Complex:** The presence of oxalate (ox) as a strong field ligand allows for the pairing of electrons, leading to the formation of an inner orbital complex.
- **Optical Isomerism:** The geometry of the complex allows for non-superimposable mirror images due to the arrangement of oxalate ligands.

**Conclusion:** This option is correct.

### Final Conclusion
The incorrect match for the given complex compound/ion and its characteristics is **Option 2**.