Question Detail
Question
Which of the following acid-derivatives are most stable?
Correct Answer
Option C is the correct answer.
Detailed Explanation
Amides are the most stable of the carboxylic acid derivatives because they have the most stable resonance forms, with significant contribution from the resonance structure where the nitrogen lone pair is delocalized into the carbonyl, giving the C-N bond partial double bond character.
Hint
Which acid derivative has the most resonance stabilization?