Chemical Forums
Chemistry Forums for Students => Organic Chemistry Forum => Topic started by: yitriana on April 08, 2009, 02:19:48 PM
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Dear yitriana;
What is Wikipedia telling you about?, - Have you already ask it?
Good Luck!
ARGOS++
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You could also check a textbook for the definition of aromatic, there is, as I recall a pretty simple caluclation, that involes summing the electrons. It will come in handy for you in the future, if you have to know the aromaticity of an anion, or a cation, see here:
http://en.wikipedia.org/wiki/H%C3%BCckel%27s_rule
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yes and yes.
the double bonds provide 6 pi electrons in pyridine, while the electrons on the nitrogen do not partake in this aromaticity. (ie this is a "basic" nitrogen. a nitrogen whose electron pairs give rise to aromaticity would be significantly less basic).
napthalene has 10 electrons as part of its aromatic system, and according to huckel's 4N+2 rule (here with n=4), it is aromatic.