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Topic: Aromatic and non-aromatic molecules  (Read 4217 times)

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Offline vivekfan

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Aromatic and non-aromatic molecules
« on: June 18, 2009, 10:27:03 PM »
My book says that one of the conditions for aromaticity is that the molecule must be planar. What does this mean? Because the book shows an example of a planar and nonplaner molecule and  I can't really tell any difference. Please help. Thanks.
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Offline 408

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Re: Aromatic and non-aromatic molecules
« Reply #1 on: June 19, 2009, 01:14:56 AM »
If not planar your p-orbitals do not overlap, preventing electronic communication necessary for aromaticity.
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Offline stevet

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Re: Aromatic and non-aromatic molecules
« Reply #2 on: June 20, 2009, 03:04:09 AM »
By planar, they mean flat, or that all the atoms in the aromatic system lie in one plane (i.e. the plane of the page). This then allows the p-orbitals of the atoms to overlap, as thay all also lie in a single plane (the plane coming out of the page) and this then allows for aromaticity.
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