Resonance structures of some aromatic compounds

Do compounds like tropolone, furan, and thiophene (which are aromatic) show resonance?


[![Compounds mentioned in question](https://i.stack.imgur.com/jspHP.png)](https://i.stack.imgur.com/jspHP.png)


If yes then what are the resonance structures that can be drawn? Also, do all aromatic compounds show resonance?




Resonance structures can be drawn for **all** aromatic compounds. Tropolone, furan and thiophene are considered to be aromatic compounds because 


* we can draw resonance structures
* and they are cyclic compounds with 4n+2 (n=1) pi electrons


Here are the resonance structures we can draw for **tropolone**, the positive charge can be delocalized to every carbon in the ring.


![enter image description here](https://i.stack.imgur.com/G62l6.jpg)


Just like in benzene, where instead of drawing 2 resonance structures (top of following figure) we usually just draw the one resonance structure shown at the bottom of the figure;


![enter image description here](https://i.stack.imgur.com/zx9oT.png)


instead of drawing all 8 resonance structures for tropolone, we usually represent them by just drawing the one resonance structure shown at the bottom of the tropolone figure.


and here are the resonance structures for **furan**


![enter image description here](https://i.stack.imgur.com/O9udD.png)


and for **thiophene**, they are the same as furan, just replace the oxygen with a sulfur atom in the resonance structures.


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