MCAT Organic Chemistry Question 4: Answer and Explanation
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Question: 4
4. What is the highest-priority functional group in this molecule?
- A. Anhydride
- B. Carbonyl
- C. Ketone
- D. Alkyl chain
Correct Answer: A
Explanation:
This molecule features an anhydride. The only other groups are hydrocarbon chains, which will provide part of the name of the parent root. Keep in mind that when a carbonyl group is present with a leaving group, the larger functional group (carboxylic acid, anhydride, ester, amide) takes priority over the carbonyl group alone. This molecule is propanoic anhydride.