Which of the following compounds will undergo carbylamine reaction?

Options

A. `(CH_3CH_2)_2NH`
B. `(CH_3)_2NH`
C. `C_6H_5NH_2`
D. `(CH_3)_3N`

Answer

To determine which of the given compounds will undergo the carbylamine reaction, we need to understand what the carbylamine test is and the conditions under which it occurs.

### Step-by-Step Solution:

1. **Understanding the Carbylamine Reaction**:
- The carbylamine reaction is a test for primary amines. When a primary amine reacts with chloroform (CHCl3) in the presence of a strong base (like potassium hydroxide, KOH), it produces an isocyanide (carbylamine), which has a characteristic foul odor.

2. **Identifying Primary Amines**:
- To determine which compounds will undergo the carbylamine reaction, we need to identify which of the given compounds are primary amines.
- Primary amines have the general structure R-NH2, where R is an alkyl or aryl group.

3. **Analyzing the Given Compounds**:
- Look at each of the compounds provided in the options.
- Check if they contain the -NH2 group and whether it is attached to a carbon that is only connected to one other carbon (indicating it is a primary amine).

4. **Testing Each Compound**:
- For each compound:
- If it is a primary amine, it will react with chloroform and KOH to produce an isocyanide.
- If it is a secondary or tertiary amine, or if it is not an amine at all, it will not undergo the carbylamine reaction.

5. **Conclusion**:
- After analyzing all the options, identify the compound(s) that are primary amines. These are the compounds that will undergo the carbylamine reaction.

### Example Analysis:
- If the options were:
1. Methylamine (CH3NH2) - Primary amine
2. Dimethylamine (CH3)2NH - Secondary amine
3. Trimethylamine (CH3)3N - Tertiary amine
4. Aniline (C6H5NH2) - Primary amine

- The compounds that will undergo the carbylamine reaction are Methylamine and Aniline, as they are primary amines.

### Final Answer:
- The compounds that will undergo the carbylamine reaction are the primary amines identified from the options.

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