Question

How many uncharged resonance structures are there for azulene?

Answer 1

Answer:

2 uncharged resonance structures are there for azulene.

Explanation:

Azulene is a nonbenzoid combined ring system. in which 7 membered ring of carbon and 5 membered ring of carbon are fused together. Due to presence of $sp^2$ carbon atoms delocalization of electrons takes place which give rise to various resonance structure of azulene.

There are total 5 carbon carbon double bonds in an azulene molecule.

2 uncharged resonance structures are there for azulene which shoen in image attached.