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A geodesic polyarene in organic chemistry is a polycyclic aromatic hydrocarbon with curved convex or concave surfaces . Examples are fullerenes, nanotubes, corannulenes, helicenes and sumanene. The carbon atoms in these systems are to some extent pyramidalized resulting a different pi electron density on either side of the molecule with consequences for reactivity.
Additional recommended knowledge
One member of this group of organic compounds, pentaindenocorannulene (depicted below)  , can be considered a large fullerene fragment. The experimentally obtained curvature and degree of pyramidalizion (12.6° ) are both actually larger than that of fullerene but according to its discoverers the compound is relatively easy to synthesize starting from corannulene and a way is opened to produce larger such fragments by stitching.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Geodesic_polyarene". A list of authors is available in Wikipedia.|