`C_(4)H_(7)OCl overset(NH_(3))rarr C_(4)H_(9)ON underset(KOH)overset(Br_(2))rarr CH_(3)CH_(2)CH_(2)NH_(2)` Compound (X) is

Options

A.
B.
C.
D.

Answer

To determine the initial compound (X) in the reaction sequence given, we can break down the process step by step.

### Step 1: Identify the Final Product
The final product given is CH₃CH₂CH₂NH₂, which is a primary amine. This suggests that the compound before the final step was likely an amide, as the reaction involves the Hofmann bromamide reaction.

### Step 2: Determine the Amide Structure
The Hofmann bromamide reaction converts an amide to a primary amine. Therefore, we can deduce that the compound before the addition of Br₂ and KOH was an amide. The structure of the amine CH₃CH₂CH₂NH₂ indicates that the corresponding amide would be CH₃CH₂CH₂C(O)NH₂.

### Step 3: Identify the Preceding Compound
The compound that reacts with NH₃ to form the amide must be an acyl chloride (since acyl chlorides react with ammonia to form amides). The acyl chloride corresponding to the amide CH₃CH₂CH₂C(O)NH₂ would be CH₃CH₂CH₂C(O)Cl.

### Step 4: Write the Structure of Compound (X)
Thus, the initial compound (X) must be CH₃CH₂CH₂C(O)Cl, which can be represented as C₄H₇OCl. This matches the molecular formula given in the question.

### Conclusion
Therefore, the initial compound (X) is **butanoyl chloride (C₄H₇OCl)**.

### Summary of Steps:
1. Identify the final product as a primary amine.
2. Determine that the compound before the final step was an amide.
3. Identify the acyl chloride that reacts with NH₃ to form the amide.
4. Conclude that the initial compound (X) is butanoyl chloride.