Aromaticity as a Quantitative Concept. 6. Aromaticity Variation with Molecular Environment.
The classical aromaticity of most heterocycles, and of some carbocycles such as azulene, increases with the polarity of the medium as shown by experimental and calculated bond lengths, aromaticity indices, and dipole moments.
Katritzky
Alan R.
AR
Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, and Department of Chemistry, University of Tartu, 2 Jakobi St., Tartu EE2400, Estonia.
Karelson
Mati
M
Wells
Adam P.
AP