PORPHYRINS WITH AROMATIC 26-PI-ELECTRON SYSTEMS

Citation
T. Wessel et al., PORPHYRINS WITH AROMATIC 26-PI-ELECTRON SYSTEMS, Angewandte Chemie, International Edition in English, 32(8), 1993, pp. 1148-1151
Citations number
26
Categorie Soggetti
Chemistry
ISSN journal
05700833
Volume
32
Issue
8
Year of publication
1993
Pages
1148 - 1151
Database
ISI
SICI code
0570-0833(1993)32:8<1148:PWA2S>2.0.ZU;2-Y
Abstract
Remarkably aromatic are the diaza[26]annulenes of type 1, which are st abilized by pyrrole rings positioned at the corners. This has been pro ven by H-1 NMR spectroscopy, crystal structure analysis, and by electr ophilic substitution reactions. In contrast, for the simple annulenes (CH)n, the aromaticity ''stops'' at the 22pi electron system.