Predict the major, organic product for the following reaction.

• A.
• B.
• C.
• D.

Answer: (D)

Verified step by step guidance

1. Identify the starting material as a Grignard reagent, which is an organomagnesium compound. In this case, it is a primary alkyl magnesium bromide.
2. Recognize that the reaction involves the addition of carbon dioxide (CO2) to the Grignard reagent. This is a common reaction to form carboxylic acids.
3. Understand that the Grignard reagent will act as a nucleophile, attacking the electrophilic carbon in CO2, leading to the formation of a carboxylate intermediate.
4. After the nucleophilic attack, the intermediate formed is a magnesium carboxylate complex. This intermediate is not stable and will be protonated in the next step.
5. The final step involves the addition of an acid (H+ quench) to protonate the carboxylate ion, resulting in the formation of the corresponding carboxylic acid as the major organic product.