sigma-Homoconjugation in Cyclically Preoriented N4-(Radical) Cations-N small middle dot small middle dot small middle dotN Bond Lengths >2 Å This project has been supported by the Deutsche Forschungsgemeinschaft, the Fonds der Chemischen Industrie and BASF AG. We thank Dipl.-Chem. V. Peron and B. Geiser for technical assistance.
Exner
K
Institut für Organische Chemie und Biochemie der Universität Freiburg Albertstrasse 21, 79104 Freiburg (Germany).
Großmann
B
Gescheidt
G
Heinze
J
Keller
M
Bally
T
Bednarek
P
Prinzbach
H