13C-NMR Spectra of Benzocycloalkenes
✍ Scribed by Prof. Dr. Harald Günther; Dipl.-Chem. Günther Jikeli; Dipl.-Chem. Hans Schmickler; Jörn Prestien
- Publisher
- John Wiley and Sons
- Year
- 1973
- Tongue
- English
- Weight
- 221 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0044-8249
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with sulfur-and phosphorus-substituted carbanionoid cent e r ~[ ' ~' (AS ca. -10 to + 10). Replacement of H by Br leads in the Li derivatives (2)-(4) (AShd=70-90) to a four-to five-fold greater downfield shift than that in the H compounds (AS,, = 14-24). Thus it may be concluded that considerable we
## Abstract The ^13^C NMR spectra of a number of derivatives of the cyclic acylal of malonic acid and of dimethylbarbituric acid are reported. These compounds contain an electron poor polarized carbon ‐ carbon double bond and act therefore, as Lewis acids.