Illustrated Glossary of Organic Chemistry
Aromaticity:
Special
molecular
stability associated with a closed loop of adjacent, parallel, overlapping
p
orbitals
containing 4n+2
pi electrons
(n = 0, 1, 2, 3, etc.;
Huckel's rule
).
Benzene
Furan
Cyclobutadiene
Cyclooctatetraene
Aromatic (n = 1)
Antiaromatic
(n =1/2)
Nonaromatic
(n = 3/2)
Related terms:
Benzene ring
,
phenyl
,
Ph
,
Ar
,
heteroaromatic
,
aromatic stacking
,
aromatic-aromatic interaction
,
electrophilic aromatic substitution
,
nucleophilic aromatic substitution
,
resonance
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