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Die Elektronenspektren des Azulenium‐ und des Heptalenium‐Kations
Author(s) -
Meier W.,
Meuche Doris,
Heilbronner E.
Publication year - 1962
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19620450734
Subject(s) - chemistry , molecule , absorption spectroscopy , crystallography , organic chemistry , quantum mechanics , physics
The electronic absorption spectra of the azulenium cation (II), the 1,2‐benzo‐azulenium cation (VII), the 5,6‐benzoazulenium cation (IX), the cations obtained from 4,5‐benzoazulene and the heptalenium cation (V) have been interpreted on the basis of a « molecules in molecules » model. The longwave bands of the spectra quoted are shown to be essentially charge‐transfer bands, the position of which is indicative of an effective electron affinity of the tropylium cation of −6,4 eV and of −6,2 eV for the benztropylium cation.