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Resonance Effect

How many unch...

Question

How many uncharged resonance structures are there for azulene?

A

1

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B

2

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C

3

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D

4

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Solution

The correct option is A 2
Azulene( $C_{10} H_{8}$ ), is an aromatic bicyclic isomer of naphthalene, is a non-benzenoid hydrocarbon.
Resonance delocalization of azulene affords an electron-deficient seven-membered ring and an electron-rich five-membered ring to gain Huckel aromatic stabilization.

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