How many of the following compounds are aromatic according to Huckel’s rule?

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answer is 2.

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Detailed Solution

[Step 1]:Huckel rule: Presence of ( 4n + 2 ) π – electrons in the ring where n is an integer (n=0,1,2,…)[Step 2]: contain 6 π and 10 π electrons according to Huckel rule. Therefore, these two are aromatic.[Step 3]: and contain 4 π, electrons and are not aromatic.

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