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Question

How many uncharged resonance structures are there for azulene?
770880_deac0471cdf246e0bca401d8d958e164.png

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(C10H8), 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.

1123577_770880_ans_5b52c79923aa4f2ab4b4f7cdf02edc3a.png

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