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Topic: Frost circles and aromaticity  (Read 2036 times)

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Offline davidenarb

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Frost circles and aromaticity
« on: July 15, 2014, 12:25:20 AM »
Frost circles method is designed to help us to draw the relative energy levels of a conjugated ring pi compound.
The tricky point that I found is to draw the inscribed regular polygon. For example, if I want to draw a seven-membred polygon, do I need to do all that geometry [ http://upload.wikimedia.org/wikipedia/commons/d/d9/Approximated_Heptagon_Inscribed_in_a_Circle.gif ]?

If there is a simpler method, please provide it.

Thanks

Mod Edit: Fixed Frost (Forst) misspelling in subject
« Last Edit: July 16, 2014, 05:49:58 AM by billnotgatez »

Offline Corribus

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Re: Frost circles and aromaticity
« Reply #1 on: July 15, 2014, 09:40:37 AM »
Well if all you want to know is the energy levels, you can just use the formula resulting from generic solution to the Huckel method for cyclic polyenes. It's fairly simple and can be found here:

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



Mod Edit: Fixed Frost (Forst) misspelling in subject
« Last Edit: July 16, 2014, 05:50:53 AM by billnotgatez »
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