ISSN:
0749-1581
Keywords:
Multinuclear magnetic resonance
;
Trifluoroenaminone
;
Conformation
;
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The structures of 4-N-methylamino and 4-N,N-dimethylamino-1,1,1-trifluorobut-3-en-2-one (1, 2) were solved by means of an analysis of 1H, 1H and 1H, 13C coupling constants. NOE measurements, 13C, 1H heteronuclear correlation and selective decoupling. The spectra of 1 are strongly solvent dependent. Variable-temperature experiments indicated that in these compounds the double bond character of the C—N bond is fairly pronounced and that the p-electrons from the nitrogen atom are engaged in the conjugated π-electron system. 14N, 15N, 17O and 19F chemical shifts for 1 are reported.
Additional Material:
1 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/mrc.1260310904
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