Which one can gives propanamine on reaction with `LiAlH_(4)`

Options

A. Propyl cyanide
B. N-Methyl Propanamide
C. Propane nitrile
D. Both (1) & (3)

Answer

To determine which compound can give propanamine upon reaction with lithium aluminium hydride (LiAlH₄), we need to analyze the possible candidates and their structures. Propanamine has the chemical formula CH₃CH₂CH₂NH₂, which indicates it is a primary amine with three carbon atoms in the alkyl chain.

### Step-by-Step Solution:

1. **Identify the Structure of Propanamine:**
- Propanamine (also known as propylamine) has the structure CH₃CH₂CH₂NH₂. This means it has three carbon atoms and an amine functional group.

2. **Understand the Reactivity of LiAlH₄:**
- Lithium aluminium hydride is a strong reducing agent that can reduce nitriles and amides to primary amines.

3. **Analyze the Given Compounds:**
- We need to evaluate each compound to see if it can be converted to propanamine through reduction with LiAlH₄.

a. **Propyl Cyanide (Butyronitrile):**
- Structure: CH₃CH₂CH₂CN
- Reaction: When reacted with LiAlH₄, it would yield CH₃CH₂CH₂CH₂NH₂ (butylamine), which has four carbons. This is incorrect.

b. **N-Methylpropanamide:**
- Structure: CH₃CH₂CONHCH₃
- Reaction: When reacted with LiAlH₄, it would yield CH₃CH₂CH₂NHCH₃ (a secondary amine). This is also incorrect as we need a primary amine.

c. **Propane Nitrile:**
- Structure: CH₃CH₂CN
- Reaction: When reacted with LiAlH₄, it would yield CH₃CH₂CH₂NH₂ (propanamine). This is correct as it gives the desired product.

4. **Conclusion:**
- The compound that gives propanamine upon reaction with LiAlH₄ is **Propane Nitrile** (CH₃CH₂CN).

### Final Answer:
The compound that can give propanamine on reaction with LiAlH₄ is **Propane Nitrile**.