The potent carcinogenic polynuclear hydrocarbon 1,2-benzpyrene is constructed entirely of fused arom — Aromatic Hydrocarbons Chemistry Question
Question
The potent carcinogenic polynuclear hydrocarbon 1,2-benzpyrene is constructed entirely of fused aromatic rings. How many distinct, individual benzenoid six-membered rings are fused together to form the complete molecular skeleton of 1,2-benzpyrene?
Answer: 5
💡 Solution & Explanation
1,2-Benzpyrene (also known as benzo[a]pyrene) is a classic polycyclic aromatic hydrocarbon (PAH) formed by incomplete combustion. Its molecular structure consists of a pyrene nucleus (which itself has 4 fused rings) fused with an additional benzene ring, making a total of exactly 5 fused six-membered benzenoid rings.
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