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 th

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?

Prashant Kotian · Accepted Answer

Correct answer: 5. 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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