W2013CHM2311 Part 5 Notes

W2013CHM2311 Part 5 Notes

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Unformatted text preview: p; MO Theories Resonance theory tells us that if several resonance structures can be drawn for a given molecule, then the molecule will be more stable than it would be if only one Lewis structures could be drawn for it. ↳  See notes on Lewis and Resonance Theories for a review of this. In other words, resonance theory is saying that delocaliza9on of electrons results in stabiliza9on. Therefore, according to resonance theory alone, we would predict that both benzene and cyclobutadiene are stabilized as a result of delocaliza0on of electrons. MO Theory has shown us that delocaliza9on of electrons does not always result in stabiliza9on. For example, in cyclobutadiene, delocaliza0on results in destabiliza9on! Resonance theory alone could not make such a predic0on! MO theory is the more accurate predictor of energe0c stability or instability. HMO Theory Predic0on of Aroma0city & An0aroma0city We have looked at MO descrip0on...
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This note was uploaded on 03/28/2014 for the course CHM 2311 taught by Professor Richardson during the Winter '09 term at University of Ottawa.

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