Is this organic compound aromatic?

[UNknown 2010]

http://img145.imageshack.us/my.php?image=76160136el9.png

 

[GCT]

http://img145.imageshack.us/my.php?image=76160136el9.png

Show your work ... and use Huckel.

 

[prize fight]

Furan is an aromatic compound because of Huckel's rule. One of the lone pairs of electrons on the oxygen goes on to the ring and giving it a 4n+2 system.

 

[UNknown 2010]

pi electrons = 2 × 2 = 4

(4-2)/4 = 1/2
It is not aromatic

 

[Borek]

pi electrons = 2 × 2 = 4

(4-2)/4 = 1/2

That's not Hückel's rule, or at least not in the form I understand.

It is not aromatic

See prize fight answer.