Which of the following compound reacts with chlorofom and a base of form phenyl isocyanide?

Options

A. Phenol
B. Aniline
C. Benzene
D. Nitro benzene

Answer

To determine which compound reacts with chloroform and a base to form phenyl isocyanide, we can follow these steps:

### Step 1: Understand the Reaction
The reaction in question is known as the Carbylamine reaction. This reaction is characteristic of primary amines, where the amine reacts with chloroform (CHCl3) in the presence of a base (commonly KOH) to produce isocyanides.

### Step 2: Identify the Compounds
We have four compounds to consider:
1. Phenol (C6H5OH)
2. Aniline (C6H5NH2)
3. Benzene (C6H6)
4. Nitrobenzene (C6H5NO2)

### Step 3: Analyze Each Compound
- **Phenol**: This compound contains a hydroxyl group (OH) and is not an amine. Therefore, it will not undergo the Carbylamine reaction.

- **Aniline**: This compound has an amino group (NH2) attached to a benzene ring. Aniline is a primary amine and will react with chloroform and a base to form phenyl isocyanide.

- **Benzene**: This compound does not contain an amine group at all, so it cannot participate in the Carbylamine reaction.

- **Nitrobenzene**: This compound has a nitro group (NO2) and does not contain an amine group. Thus, it will not react in this manner.

### Step 4: Conclusion
Among the four compounds, only **Aniline** (C6H5NH2) is a primary amine that will react with chloroform and a base to produce phenyl isocyanide.

### Final Answer
The compound that reacts with chloroform and a base to form phenyl isocyanide is **Aniline**.

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