Which of the following will not give carbylamine reaction?

Options

A. `CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)C-NH_(2)`
B.
C. `CH_(3)-CH_(2)-underset(CH_(3))underset(|)(CH)-NH_(2)`
D. `CH_(3)-NH-CH_(3)`

Answer

To determine which of the following will not give a carbylamine reaction, we need to understand the nature of the compounds involved and how the carbylamine reaction works.

### Step-by-Step Solution:

1. **Understanding Carbylamine Reaction**:
The carbylamine reaction is a test used to identify primary amines. When a primary amine reacts with chloroform (CHCl3) in the presence of a strong base (like KOH or NaOH), it produces an isocyanide (carbylamine), which is a positive test for the presence of a primary amine.

2. **Identifying the Types of Amines**:
- **Primary Amines (1°)**: These have one alkyl or aryl group attached to the nitrogen atom (e.g., R-NH2).
- **Secondary Amines (2°)**: These have two alkyl or aryl groups attached to the nitrogen atom (e.g., R2-NH).
- **Tertiary Amines (3°)**: These have three alkyl or aryl groups attached to the nitrogen atom (e.g., R3-N).

3. **Analyzing the Given Compounds**:
Without the specific compounds listed in the question, we will assume that there are four compounds, and we need to identify which one is a secondary amine.
- For example, if the compounds are:
1. CH3NH2 (Methylamine - Primary)
2. C2H5NH2 (Ethylamine - Primary)
3. CH3NHCH3 (Dimethylamine - Secondary)
4. (CH3)3N (Trimethylamine - Tertiary)

4. **Applying the Carbylamine Test**:
- **Primary Amines**: Compounds 1 and 2 will give a positive carbylamine reaction as they are primary amines.
- **Secondary Amines**: Compound 3 (Dimethylamine) will not give a positive carbylamine reaction as it is a secondary amine.
- **Tertiary Amines**: Compound 4 (Trimethylamine) will also not give a positive carbylamine reaction.

5. **Conclusion**:
Based on the analysis, the compound that will not give a carbylamine reaction is the secondary amine (in this case, Dimethylamine).

### Final Answer:
The compound that will not give a carbylamine reaction is the secondary amine.