Ch. 15 Benzene Reactivity. Huckel’s Rule: 4n + 2 p electrons = aromatic 4n p electrons = antiaromatic Nonconjugated = nonaromatic 1,3-cyclobutadiene 4n electrons (n = 1) Air sensitive and very reactive, going to 1,3-butadiene structures
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4n p electrons = antiaromatic
Nonconjugated = nonaromatic
5) Loss of H+ is favored (exothermic) because in reforms the aromatic ring
a) Polyalkylation is difficult to stop (more than one R group adds)
a) There is no danger of rearrangement