Chapter 17: Q.1. (page 641)
Question: Draw all possible resonance structures for the antihistamine diphenhydramine, the active ingredient in Benadryl.

Short Answer
Answer
Resonating structures of diphenhydramine.

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Chapter 17: Q.1. (page 641)
Question: Draw all possible resonance structures for the antihistamine diphenhydramine, the active ingredient in Benadryl.

Answer
Resonating structures of diphenhydramine.

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Question: Pentalene, azulene, and heptalene are conjugated hydrocarbons that do not contain a benzene ring. Which hydrocarbons are especially stable or unstable based on the number of electrons they contain? Explain your choices.

Question: Draw a stepwise mechanism for the following reaction.

Question: How many NMR signals does each compound exhibit?
Question: You have a sample of a compound of molecular formula , which has a benzene ring substituted by two groups, and , and exhibits the given NMR. What disubstituted benzene isomer corresponds to these data?

Question: Compounds A and B are both hydrogenated to methylcyclohexane. Which compound has the larger heat of hydrogenation? Which compound is more stable?

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