Which of the following statements is consistent with the mechanism for nucleophilic addition of aldehydes/ketones under acidic conditions?

Question

Quizplus · Accepted Answer

In nucleophilic addition of aldehydes/ketones under acidic conditions, the first step involves protonation of the carbonyl oxygen by a hydronium ion (H3O+), which leads to the formation of an oxonium ion. This proton transfer is followed by a nucleophilic attack by the nucleophile (such as water, alcohol, or amine), which is attracted to the positively charged carbon atom of the oxonium ion. Therefore, option A is the correct choice as it describes the correct sequence of proton transfer followed by nucleophilic attack. Option B is incorrect because the nucleophile attacks first before the proton transfer, which is not consistent with the mechanism. Option C is incorrect as nucleophilic attack alone cannot account for the protonation of the carbonyl oxygen. Option D is incorrect because proton transfer is essential for the reaction to proceed.

Which of the Following Statements Is Consistent with the Mechanism