The `Cl-Co-Cl` bond angle values in a `Fac-[Co(NH_(3))_(3)Cl_(3)]` complex is/are :

Options

A. `180^(@)`
B. `90^(@)`
C. `90^(@)` and `180^(@)`
D. `90^(@)` and `120^(@)`

Answer

To determine the `Cl-Co-Cl` bond angle in the `Fac-[Co(NH₃)₃Cl₃]` complex, we can follow these steps:

### Step 1: Identify the Geometry of the Complex
The complex `Fac-[Co(NH₃)₃Cl₃]` is an octahedral complex. In octahedral complexes, the central metal ion is surrounded by six ligands arranged at the corners of an octahedron.

**Hint:** Remember that octahedral complexes have specific arrangements of ligands that affect the bond angles.

### Step 2: Understand the Facial (Fac) Isomer
In the facial isomer, the three identical ligands (in this case, `NH₃`) occupy one face of the octahedron, while the three `Cl` ligands occupy the opposite face. This arrangement leads to specific bond angles between the ligands.

**Hint:** Visualize the octahedral structure and how the ligands are positioned to understand the bond angles.

### Step 3: Determine the Bond Angles
In the `Fac-[Co(NH₃)₃Cl₃]` complex:
- The `Cl` ligands are positioned such that the bond angles between them, specifically `Cl-Co-Cl`, are 90 degrees.
- The bond angles between the `NH₃` ligands and the `Cl` ligands are also 90 degrees due to their arrangement.

**Hint:** Use the octahedral geometry to deduce that the angles between ligands on the same axis are 90 degrees.

### Step 4: Conclusion
Thus, the `Cl-Co-Cl` bond angle in the `Fac-[Co(NH₃)₃Cl₃]` complex is 90 degrees.

**Final Answer:** The `Cl-Co-Cl` bond angle values in `Fac-[Co(NH₃)₃Cl₃]` is 90 degrees.