W2013CHM2311 Part 5 Notes

Eg benzene contains 6 electrons 4n 2 where n 1

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Unformatted text preview: Combina0on of Two Ethylene Fragments TOP VIEW A A S S ethylene ethylene cyclobutadiene The π- system of a cyclobutadiene ring is destabilized rela0ve to the π- system of isolated ethylene fragments (electrons are in orbitals of higher energies). Since interac0on of the π- systems (i.e., delocaliza0on of electrons) results in destabiliza0on, cyclobutadiene is said to be an9aroma9c. Cyclobutadiene π- MO Diagram: Combina0on of Two Ethylene Fragments TOP VIEW A A not degenerate S S ethylene ethylene cyclobutadiene The π- system of a cyclobutadiene ring is destabilized rela0ve to the π- system of isolated ethylene fragments (electrons are in orbitals of higher energies). Since interac0on of the π- systems (i.e., delocaliza0on of electrons) results in destabiliza0on, cyclobutadiene is said to be an9aroma9c. Comparison of Resonance &am...
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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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