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Cover Picture: Calix[n]bispyrrolylbenzenes: Synthesis, Characterization, and Preliminary Anion Binding Studies (Chem. Eur. J. 7/2005)

✍ Scribed by Jonathan L. Sessler; Deqiang An; Won-Seob Cho; Vincent Lynch; Manuel Marquez

Publisher: John Wiley and Sons
Year: 2005
Tongue: English
Weight: 214 KB
Volume: 11
Category: Article
ISSN: 0947-6539
DOI: 10.1002/chem.200590020

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## Abstract **The cover picture shows** the structure of 5‐aza[5]helicene (top) and the crystal packing (single enatiomers, bottom). This is one of the aza[5]helicenes reported in the paper that were synthesized by photochemical ring closure of suitable ethenyl derivatives. The photophysical proper