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The reaction between R–CH=O and H2N–NH2 to form R–CH=N–NH2 happens in a mildly acidic environment and involves the addition of a nucleophile derived from ammonia. Which of the following is correct?

1. The reaction proceeds in an acidic medium.
2. The process involves the addition of a nucleophilic ammonia derivative.
3. The product formed is R–CH=N–NH2.
4. None of these statements are correct.

Correct answer: The process involves the addition of a nucleophilic ammonia derivative.

Solution

The reaction involves the nucleophilic addition of the ammonia derivative (H2N–NH2) to the carbonyl group (R–CH=O), leading to the formation of R–CH=N–NH2. This is a characteristic reaction of hydrazine with aldehydes or ketones.

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