which amine on reaction with Hinsberg reagent gives :

Options

A. Only `1^@`
B. Only` 2^@`
C. both `1^@ & 2^@`
D. `1^@,2^@ & 3^@`

Answer

To determine which amine reacts with Hinsberg reagent, we need to analyze the behavior of primary, secondary, and tertiary amines when they come into contact with this reagent.

### Step-by-Step Solution:

1. **Understanding Hinsberg Reagent**:
- The Hinsberg reagent is benzene sulfonyl chloride (C6H5SO2Cl). It is used to differentiate between primary, secondary, and tertiary amines.

2. **Reaction with Primary Amines**:
- When a primary amine (RNH2) reacts with the Hinsberg reagent, it forms a sulfonamide (RNH-SO2C6H5) and releases HCl as a byproduct.
- The reaction can be represented as:
\[ RNH_2 + C_6H_5SO_2Cl \rightarrow RNH-SO_2C_6H_5 + HCl \]
- The product (sulfonamide) is soluble in alkali.

3. **Reaction with Secondary Amines**:
- Secondary amines (R2NH) also react with the Hinsberg reagent, forming a sulfonamide (R2N-SO2C6H5) and releasing HCl.
- The reaction can be represented as:
\[ R_2NH + C_6H_5SO_2Cl \rightarrow R_2N-SO_2C_6H_5 + HCl \]
- The product formed is slightly soluble in alkali.

4. **Reaction with Tertiary Amines**:
- Tertiary amines (R3N) do not react with the Hinsberg reagent. This is because there are no hydrogen atoms attached to the nitrogen that can be replaced during the reaction.
- Therefore, tertiary amines remain unreacted.

5. **Conclusion**:
- Both primary and secondary amines react with the Hinsberg reagent, while tertiary amines do not. Thus, the answer to the question is that primary and secondary amines give a reaction with Hinsberg reagent.

### Final Answer:
Both primary and secondary amines react with Hinsberg reagent, while tertiary amines do not.

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