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Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: Nitin_Naudiyal on December 11, 2012, 02:23:12 AM

Title: Aromatic Character using Huckel Rule
Post by: Nitin_Naudiyal on December 11, 2012, 02:23:12 AM

Hucke Rule states that " Any Cyclic, planar and Conjugated compound containing (4n + 2)∏ electrons, where n = 0, 1, 2...

I have the following question:
What does Conjugated means?
I read that it means alternate single and double bonds.

And how to calculate the number of pi electrons in a structure.
Is it that a double bond has 2 pi electrons and triple bond has 3 pi electrons?

Thank you

Title: Re: Aromatic Character using Huckel Rule
Post by: Hunter2 on December 11, 2012, 02:30:13 AM

Yes conjugated means alternating double-single bond and they can exchange each other. Best example Benzene.

Yes double bond has two pi and triple bond 4 pi-Electrons

Title: Re: Aromatic Character using Huckel Rule
Post by: Dan on December 11, 2012, 04:38:28 AM

See also: http://en.wikipedia.org/wiki/Conjugated_system