Which are aromatic?

[faerielynx]

Hi everyone,
can someone explain how to know if a compound is aromatic? I looked everywhere but still don't fully understand it...
I know it must be:
4n+2pi
every atom must have a p orbital
cyclic
planer
how it apply the first two? Or an easy way to figure it out... (be detailed as you can)
Thanks

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[swtcatastrophe]

Hi everyone,
can someone explain how to know if a compound is aromatic? I looked everywhere but still don't fully understand it...
I know it must be:
4n+2pi
every atom must have a p orbital
cyclic
planer
how it apply the first two? Or an easy way to figure it out... (be detailed as you can)
Thanks

http://en.wikipedia.org/wiki/Aromatic

this can explain it way better than i can.

 

[bigstix808]

Hi everyone,
can someone explain how to know if a compound is aromatic? I looked everywhere but still don't fully understand it...
I know it must be:
4n+2pi
every atom must have a p orbital
cyclic
planer
how it apply the first two? Or an easy way to figure it out... (be detailed as you can)
Thanks

before you can come CLOSE to understanding aromaticity, you need to master orbital hybridization. and to any other orgo guru's out there, i think they'll agree. sure you could memorize those rules above, but if you don't know which atoms in a particular ring are hybridized sp3, sp2, etc, and are able to count the # of pi electrons... and to know the arangement of the p-orbitals...then it's gonna be tuff. good luck gettin that down

but to answer your question...that wikepedia site is pretty good