The homoleptic complex is

Options

A. `[Co(NH_3)_4Cl_2]^+`
B. `[Co(NH_3)_6]^(3+)`
C. `[Ni(NH_3)_4Cl_2]`
D. `[Fe(NH_3)_4Cl_2]^+`

Answer

To determine the homoleptic complex from the given options, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definition of Homoleptic Complex**:
- A homoleptic complex is defined as a coordination complex that contains only one type of ligand coordinated to the central metal atom or ion.

2. **Identify the Ligands and Metal in the Options**:
- In the provided options, we need to identify the ligands and the metal involved in each complex.

3. **Analyze Each Option**:
- Check each option to see if it contains only one type of ligand.
- For example, if one option has NH3 as the only ligand, it would be a homoleptic complex.
- If another option has both NH3 and Cl2, it would not be homoleptic since it contains more than one type of ligand.

4. **Select the Correct Option**:
- After analyzing all the options, select the one that contains only one type of ligand.
- In this case, the option with Co(NH3)6^3+ contains only NH3 as the ligand, making it a homoleptic complex.

5. **Conclusion**:
- The homoleptic complex identified is Co(NH3)6^3+.

### Final Answer:
The homoleptic complex is Co(NH3)6^3+.