Indicate which nitrogen compund amongst the following would undergo Hofimann reaction ? .

Options

A. `RCONHCH_(3)`
B. `RCO ONH_(4)`
C. `RCONH_(4)`
D. `RCONHOH`

Explanation

To determine which nitrogen compound among the given options would undergo the Hofmann reaction, we need to follow these steps:

### Step 1: Understand the Hofmann Reaction
The Hofmann reaction involves the degradation of an amide to a primary amine with one carbon atom less than the original amide. This reaction typically requires bromine (Br2) in the presence of a strong base (like NaOH or KOH).

### Step 2: Identify the Structure of Amides
The general structure of an amide is R-C(=O)-NH2, where R can be any alkyl or aryl group. The presence of the carbonyl group (C=O) adjacent to the nitrogen atom is crucial for the reaction to occur.

### Step 3: Analyze the Given Options
We need to look at the provided options and identify which one contains an amide functional group. The amide will have the structure mentioned above.

### Step 4: Select the Correct Compound
After analyzing the options, we find that the compound with the structure R-C(=O)-NH2 (an amide) is present in option 2 (assuming option 2 is the one with the amide structure).

### Step 5: Conclusion
Thus, the nitrogen compound that would undergo the Hofmann reaction is the one that contains the amide functional group.

### Final Answer
The correct answer is **Option 2**, which contains the amide structure R-C(=O)-NH2.

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