Which among the following is Wilkinson’s catalyst?

Options

A. `Pd–BaSO_(4)`
B. `TiCl_(4) +(C_(2)H_(5) )_( 3)`Al
C. Pt/PtO
D. `[(Ph_(3) P)_(3)Rh]Cl`

Answer

To determine which among the given options is Wilkinson's catalyst, we need to identify the correct chemical formula associated with it.

### Step-by-Step Solution:

1. **Understanding Wilkinson's Catalyst**:
- Wilkinson's catalyst is a coordination compound of rhodium, which is used primarily in hydrogenation reactions of unsaturated organic compounds.

2. **Identifying the Formula**:
- The formula for Wilkinson's catalyst is given as RhCl(PPh₃)₃. This means it consists of one rhodium (Rh) atom, one chloride (Cl) atom, and three triphenylphosphine (PPh₃) ligands.

3. **Analyzing the Options**:
- We need to look at the provided options and see which one matches the formula RhCl(PPh₃)₃.
- The other catalysts mentioned (Leonard's catalyst, Ziegler-Natta catalyst, and Adam's catalyst) do not correspond to this formula.

4. **Conclusion**:
- Based on the information, the correct answer is the option that corresponds to the formula RhCl(PPh₃)₃, which is Wilkinson's catalyst.

### Final Answer:
The correct answer is **RhCl(PPh₃)₃**, which is Wilkinson's catalyst.

---