Which of the following is known as Wilkinson's catalyst?

Options

A. `[Ph_(3)P)_(3)RhCl]`
B. `TiCl_(4)+(C_(2)H_(5))_(3)Al`
C. `(C_(2)H_(5))_(4)Pb`
D. `[PtCl_(2)(NH_(3))_(2)]`

Explanation

To determine which of the given options is known as Wilkinson's catalyst, we can follow these steps:

### Step 1: Identify the Options
First, we need to look at the options provided in the question. The options typically include different chemical compounds.

### Step 2: Recall the Characteristics of Wilkinson's Catalyst
Wilkinson's catalyst is known to be a rhodium complex, specifically RhCl(PPh₃)₃. It is characterized by:
- A red-violet color
- A square planar structure
- Its use in the selective hydrogenation of organic molecules

### Step 3: Analyze Each Option
Now, we will analyze the given options one by one:

1. **RhCl(PPh₃)₃**: This matches the description of Wilkinson's catalyst.
2. **TiCl₄ + C₂H₅)₃Al**: This is known as the Ziegler-Natta catalyst, used for polymerization reactions.
3. **C₂H₅₄Pb**: This compound is an anti-knocking agent used in gasoline.
4. **[PtCl₂(NH₃)₂]**: This is known as a cisplatin compound, which is used as an anti-cancer agent.

### Step 4: Conclusion
From the analysis, we can conclude that the first option, **RhCl(PPh₃)₃**, is known as Wilkinson's catalyst.

### Final Answer
**Wilkinson's catalyst is RhCl(PPh₃)₃.**

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