Aromaticity
is a chemical property in which a conjugated
ring of unsaturated
bonds, lone
pairs, or empty orbitals
exhibit a stabilization stronger than would be expected by the stabilization
of conjugation
alone. It can also be considered a manifestation of cyclic
delocalization and of resonance. An aromatic
compound is one which has a ring structure around which electrons may move. That is, the electrons are not tied to a single atom or pair of atoms,
they are shared by all the atoms
around the ring. For this to be the case, certain conditions must be met:
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