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Elektronenstruktur und physikalisch-chemische Eigenschaften von Azo-Verbindungen. Teil XII: Protonierung des m-Dimethylaminophenyl-azo-azulens

✍ Scribed by F. Gerson


Publisher
John Wiley and Sons
Year
1963
Tongue
German
Weight
721 KB
Volume
46
Category
Article
ISSN
0018-019X

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✦ Synopsis


Abstract

The absorption spectra of m‐dimethylaminophenyl‐azo‐azulene in weakly acid solutions have been recorded and the possible structures of its first conjugate acid discussed. In contrast to its p‐isomer, the compound is protonated mostly on the amino nitrogen, although a measurable amount of the azonium cation is also present. Chemical shifts of the amino methyl protons have been used to demonstrate the difference in protonation of the p‐ and m‐isomers. The proton resonance results are in qualitative agreement with the conclusions drawn from the absorption spectra in the visible region.


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