First slide
Arenes
Question

Which of the following is not a hetero cyclic aromatic compound?

Moderate
Solution

[Step 1]:
Pyridine, Pyrrole and Thiophene are hetero cyclic aromatic compounds
[Step 2]:
Piperidine   

is heterocyclic but not aromatic. Because it is non planar, non  conjugated and not obey’s Huckel’s rule.

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