Which of the following amine does not react with Hinsberg's reagent ?

Options

A. `H_(3)C-CH_2-NH_(2)`
B. `H_(3)C-overset(CH_3)overset(|)underset(NH_(2))underset(|)C-CH_3`
C. `(CH_3)_3N`
D. `CH_3NH_2`

Answer

To determine which amine does not react with Hinsberg's reagent, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Hinsberg's Reagent**:
- Hinsberg's reagent is a sulfonyl chloride, specifically benzenesulfonyl chloride (C6H5SO2Cl). It is used to differentiate between primary, secondary, and tertiary amines.

2. **Identify the Nature of Amines**:
- Amines can be classified into three categories:
- Primary amines (RNH2)
- Secondary amines (R2NH)
- Tertiary amines (R3N)

3. **Reaction Mechanism**:
- Primary and secondary amines react with Hinsberg's reagent to form sulfonamides.
- Primary amines form a sulfonamide that is soluble in alkali, while secondary amines form a sulfonamide that is insoluble in alkali.
- Tertiary amines, however, do not have a hydrogen atom attached to the nitrogen that can react with the sulfonyl chloride. Therefore, they do not react with Hinsberg's reagent.

4. **Analyze the Given Options**:
- Look at the amines provided in the question. Identify which one is a tertiary amine (an amine with three alkyl groups attached to the nitrogen atom and no hydrogen).

5. **Conclusion**:
- The amine that is a tertiary amine will not react with Hinsberg's reagent.

### Final Answer:
The amine that does not react with Hinsberg's reagent is the tertiary amine.

---