A mixture containing primary, secondary and tertiary amine is treated with diethyl oxalate. Choose the correct statement

Options

A. The distillate of the mixture after treatment mainly contains `1^(2)` amine.
B. `3^(@)` amine do not react with diethyl oxalate
C. This is Hinsberg method of separating `1^(@), 2^(@)` & `3^(@)` amines.
D. `3^(@)` amine is removed by filtration

Answer

To solve the question regarding the treatment of a mixture containing primary, secondary, and tertiary amines with diethyl oxalate, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**: We have a mixture of primary amines (RNH2), secondary amines (R2NH), and tertiary amines (R3N). We are treating this mixture with diethyl oxalate (COOEt)2.

2. **Understand the Reaction**: Diethyl oxalate reacts differently with primary, secondary, and tertiary amines:
- **Primary Amines**: They react with diethyl oxalate to form oxamides.
- **Secondary Amines**: They react to form N,N-dialkyl oxamic esters.
- **Tertiary Amines**: They do not react with diethyl oxalate.

3. **Write the Reaction for Primary Amines**:
- When a primary amine reacts with diethyl oxalate, the reaction can be represented as:
\[ RNH_2 + (COOEt)_2 \rightarrow RCONH + 2C_2H_5OH \]
- This results in the formation of an oxamide.

4. **Write the Reaction for Secondary Amines**:
- When a secondary amine reacts with diethyl oxalate, the reaction can be represented as:
\[ R_2NH + (COOEt)_2 \rightarrow R_2NCOOEt + C_2H_5OH \]
- This results in the formation of an N,N-dialkyl oxamic ester.

5. **Identify the Behavior of Tertiary Amines**:
- Tertiary amines do not undergo any reaction with diethyl oxalate, meaning they remain unreacted in the mixture.

6. **Conclusion**: After treatment with diethyl oxalate, the primary amines will form oxamides, the secondary amines will form N,N-dialkyl oxamic esters, and the tertiary amines will not react at all.

7. **Choose the Correct Statement**: Based on the above reactions, the correct statement is that tertiary amines do not react with diethyl oxalate.