13C-NMR.-Spektren von 3H-Benz[cd]azulen-3-onen
✍ Scribed by Richard Neidlein; Walter Kramer; Dieter Schcutzow
- Publisher
- John Wiley and Sons
- Year
- 1982
- Tongue
- German
- Weight
- 671 KB
- Volume
- 65
- Category
- Article
- ISSN
- 0018-019X
No coin nor oath required. For personal study only.
✦ Synopsis
^13^C‐NMR. Spectra of 3__H__‐benz[cd]azulenc‐3‐ones
^13^C‐NMR. Spectra of 7,9‐dimethyl‐3__H__‐benz[cd]azulenc‐3‐one (2) and 7,9‐dimethyl‐4,5‐dihydro‐3__H__‐benz[cd]azulene‐3‐one (7) in CDCl^3^ and CF~3~CO~2~D are reported. The assignment of signals was achieved with the aid of selective proton decoupling, non‐decoupled spectra and comparison with spectra of simple azulene‐derivatives. The major localization of positive charge in the cationic 3‐hydroxybenz‐[cd]azulenium system was found in the six‐ and seven‐membered ring, which suggests in accordance with calculated π‐electron densities the structure of a benztropylium ion rather than a bridged azulenium ion.
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