Electronic Resource
Springer
Chemistry of heterocyclic compounds
8 (1972), S. 180-182
ISSN:
1573-8353
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract The cations of compounds with condensed rings containing mutually conjugated “pyridine” and “pyrrole” nitrogen atoms were considered as aromatic cyanines by the Hückel MO method. Calculation demonstrates that these sorts of cations should be thermodynamically stable and aromatic. An increase in the number of methylidyne groups between the heteroatoms leads to a bathochromic shift of the long-wave absorption band, but the magnitude of this shift also depends very much on the molecular geometry.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00472353
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