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LoySonN
#1 Posted : Monday, July 05, 2010 4:03:37 PM
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Hi there,

I am just doing my Orgo questions, and am coming across a few asking about aromatic structures/resonances. My questions is that in my notes and in the book it says Huckels rule is 4n+2 = pi electrons where n=any integer including zero. I am wondering what "n" actually is. The carbons or double bonds? If anyone could shed some light that would be great thanks!
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Nevlach
#2 Posted : Wednesday, July 07, 2010 10:43:56 PM
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"n" is just any integer it does't correspond to anything. For the ring to be aromatic it must correspond with a number that results from Huckel's Rule. For example 4(1) + 2 = 6 so if the ring structure has 6 pi electrons you know its aromatic because that 6 satisfies Huckel's Rule. So numbers 2, 6, 14, 18, 22 etc would all satisfy the rule.
Hope that makes sense!
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LoySonN
#3 Posted : Wednesday, July 07, 2010 11:53:00 PM
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Oh okay. Thank you!
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umghai
#4 Posted : Wednesday, July 20, 2011 1:49:55 AM
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What would be the rule for non-aromatic and anti-aromatic compounds?
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matthewward
#5 Posted : Wednesday, July 20, 2011 2:06:21 AM
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Irrelevant - not a topic tested anymore on the MCAT :) Focus only on the "need to know" topics - there are lots as is I assure you, lol.
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