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 will analyze each option step by step.

### Step 1: Identify the first option
- The first option is **Pd/BaSO4** (Palladium on Barium Sulfate).
- This catalyst is known for its role in the hydrogenation of alkynes to form cis-alkenes.

**Hint:** Look for catalysts that are specifically known for hydrogenation reactions.

### Step 2: Identify the second option
- The second option is **TiCl4** and **C2H5 whole thrice Al** (Triethylaluminum).
- This combination is known as the Ziegler-Natta catalyst, which is primarily used in the polymerization of alkenes, such as converting ethylene into polyethylene.

**Hint:** Remember that Ziegler-Natta catalysts are associated with polymerization processes.

### Step 3: Identify the third option
- The third option is **PTPTO** (which refers to Adams' catalyst).
- Adams' catalyst is also used in hydrogenation reactions, particularly in organic synthesis.

**Hint:** Adams' catalyst is often used for hydrogenation but is not the same as Wilkinson's catalyst.

### Step 4: Identify the fourth option
- The fourth option is **Ph3P-RHCl** (Triphenylphosphine and a metal halide).
- This is recognized as Wilkinson's catalyst, which is specifically used for the hydrogenation of olefins to produce alkanes.

**Hint:** Look for catalysts that are specifically designed for the hydrogenation of olefins.

### Conclusion
After analyzing all four options, the correct answer is **Ph3P-RHCl**, which is Wilkinson's catalyst.

### Final Answer
Wilkinson's catalyst is **Ph3P-RHCl**.