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Issue 46, 2011
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Using Clar sextets for two- and three-dimensional aromatic systems

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Abstract

After a brief history of the aromaticity concept, the use of Clar sextet circles is reviewed for explaining various aspects of planar aromatic systems (benzenoids, heterocycles) and of tridimensional carbon aggregates. When folding a graphene sheet for obtaining nanotubes, nanotori, or nanocones, the congruence of Clar sextet circles allows the classification of all such aggregates into two classes (congruent or incongruent) with marked differences in properties; this is in agreement with the well-known condition hk ≡ 0 (mod 3), equivalent to congruence, in terms of the chiral vectors h and k for graphene sheets.

Graphical abstract: Using Clar sextets for two- and three-dimensional aromatic systems

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Article information


Submitted
01 Jul 2011
Accepted
02 Sep 2011
First published
23 Sep 2011

Phys. Chem. Chem. Phys., 2011,13, 20649-20658
Article type
Paper

Using Clar sextets for two- and three-dimensional aromatic systems

A. T. Balaban, Phys. Chem. Chem. Phys., 2011, 13, 20649
DOI: 10.1039/C1CP22162K

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