The source of nitrogen in Gabriel syntheisis of amine is..

Options

A. sodium azide, `NaN_(3)`
B. sodium nitrite, `NaNO_(2)`
C. potassium cyanide, KCN
D. potassium pthalimide `C_(6)H_(4)(CO)_(2)N^(-)K^(+)`

Explanation

### Step-by-Step Solution:

1. **Understanding Gabriel Synthesis**:
Gabriel Synthesis is a method used to synthesize primary amines. It involves the use of phthalimide as a starting material.

2. **Starting Material**:
The reaction begins with phthalimide, which has the structure of a cyclic imide. The nitrogen in phthalimide is part of the imide functional group.

3. **Formation of Potassium Salt**:
When phthalimide reacts with potassium hydroxide (KOH), it forms the potassium salt of phthalimide. This step is crucial as it prepares the compound for further reaction with alkyl halides.

4. **Reaction with Alkyl Halide**:
The potassium salt of phthalimide then reacts with an alkyl halide (R-X) to form N-alkyl phthalimide. This step introduces the alkyl group into the nitrogen atom.

5. **Hydrolysis**:
The N-alkyl phthalimide undergoes alkaline hydrolysis, which involves the addition of water in the presence of a base. This reaction yields a primary amine (RNH2) and phthalic acid.

6. **Source of Nitrogen**:
The nitrogen atom in the final primary amine product comes from the original phthalimide used in the synthesis. Thus, the source of nitrogen in Gabriel Synthesis is phthalimide.

### Final Answer:
The source of nitrogen in Gabriel synthesis of amine is phthalimide.

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