Based on the resonance contributors, which atom is most likely to react with an acidic proton, H⁺?

• A. A
• B. B
• C. D
• D. C

Answer: (D)

Verified step by step guidance

1. Examine the structure provided in the image. Identify the atoms labeled A, B, C, and D. These are carbon, carbon, oxygen, and nitrogen, respectively.
2. Consider the resonance contributors of the molecule. Resonance contributors are different ways to draw the structure of a molecule that show the delocalization of electrons.
3. Identify the atom with lone pairs or negative charge that can act as a base to react with an acidic proton (H+). In this structure, the oxygen atom labeled C has lone pairs.
4. Evaluate the electronegativity of the atoms. Oxygen is more electronegative than nitrogen, making it more likely to attract and react with an acidic proton.
5. Conclude that the atom most likely to react with an acidic proton is the oxygen atom labeled C, due to its lone pairs and high electronegativity.