13C—NMR-Spektren und Bindungsverhältnisse von Ketenen / 13C—NMR-Spectra and Bonding Situation of Ketenes
Open Access
- 1 June 1974
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung B
- Vol. 29 (5-6) , 393-398
- https://doi.org/10.1515/znb-1974-5-621
Abstract
18C-NMR spectra of alkyl- and arylsubstituted ketenes are reported1e. The terminal carbon atom resonances are found at extreme highfield positions ranging from 2.5 ppm to about 50 ppm. They are the most shielded sp2-carbon-atoms observed until now. The central carbon atom resonances appear from about 190 ppm to 206 ppm. From comparisons of the chemical shifts of the ketene carbon atoms with that of analogously substituted alienes and olefines conclusions concerning the bonding situation in ketenes are drawn.Keywords
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