From: Joachim Podlech (joachim.podlech$##$po.uni-stuttgart.de)
Date: Fri Aug 11 2000 - 03:43:04 EDT
Dear Ivan,
a more commonly known name of this compound is [6]radialene. It has been
synthesized by several methods and in fact, it has been an interesting
question, whether this or other radialenes is aromatic (or anti-aromatic).
Thought it is (as Prof. Zhou wrote) not a cyclic compound, there exist
phenomenons like Y-aromaticity or homo-aromaticity, which might apply here.
Aromaticity might be seen as a definition or - might be seen as a
stabilization due to resonance.
Nevertheless, [6]radialene is NOT aromatic as has been shown in several
papers.
For more information, read the excellent review of Henning Hopf in
Angewandte Chemie:
Preparation and properties, reactions and applications of radialenes.
Hopf, Henning; Maas, Gerhard (Inst. Org. Chem., Tech. Univ.
Braunschweig, Braunschweig W-3300, Germany). Angew. Chem.,
104(8), 953-77 (See also Angew. Chem., Int. Ed. Engl., 1992, 31(4),
931-54) (German) 1992.
Hope this helped,
yours,
Joachim
_____________________________________________________
Priv.-Doz. Dr. Joachim Podlech
Institut fuer Organische Chemie
der Universitaet Stuttgart
Pfaffenwaldring 55
70569 Stuttgart
Deutschland
Tel. +711 / 685 4335 (Labors -4284 und -4286)
Fax +711 / 685 4269
E-mail joachim.podlech$##$po.uni-stuttgart.de
Homepage (English): http://www.uni-stuttgart.de/UNIuser/ochem/06e.htm
Homepage (Deutsch): http://www.uni-stuttgart.de/UNIuser/ochem/06d.htm
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Georg Christoph Lichtenberg
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