## Abstract Carbonโ13 NMR chemical shifts and oneโbond carbonโhydrogen coupling constants have been obtained at 15ยท09 MHz. The trends in the carbon chemical shifts obtained for the pyrazines parallel those of monosubstituted benzenes and 2โsubstituted pyridines, except for the __direct__ effect of
13C NMR spectra of some monosubstituted quinolizinium bromides
โ Scribed by A. Van Veldhuizen; M. Van Dijk; G. M. Sanders
- Publisher
- John Wiley and Sons
- Year
- 1983
- Tongue
- English
- Weight
- 198 KB
- Volume
- 21
- Category
- Article
- ISSN
- 0749-1581
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The 13C NMR signals for some 4substituted phenacyl bromides were assigned. The experimental chemical shifts of the aromatic ring carbons are in close agreement with those calculated using substituent chemical shifts. Both the car-bony1 and the a-methylene carbons exhibit upfield shifts compared with
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