Intramolecular Hydrogen Bond and Internal Rotation of Aminogroup in Esters of Aminoacrylic Acids

Intramolecular Hydrogen Bond and Internal Rotation of Aminogroup in Esters of Aminoacrylic Acids

The NMR 1 H and IR spectra of ethyl esters of two β-alkyl and β-aryl substituted of β-aminoacrylic acid have been measured. The results are evidence of the strong intramolecular hydrogen bond between amino group and carbonyl oxygen. The activation energy of about 20 kcal/mol was obtained for the int...

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Veröffentlicht in:Spectroscopy letters 1991-07, Vol.24 (6), p.817-825
Hauptverfasser: Hartman, H. A., Denisov, G. S., Kolbina, N. M., Neufeld, P. H., Ulashkevich, Y. V.
Format: Artikel
Sprache:eng
Schlagworte:
Atomic and molecular physics
Barrier heights (internal rotation, inversion, rotational isomerism, conformational dynamics)
Exact sciences and technology
internal rotation
intramolecular hydrogen bond
IR spectroscopy
Molecular properties and interactions with photons
NMR
Physics
Properties of molecules and molecular ions
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Zusammenfassung:The NMR 1 H and IR spectra of ethyl esters of two β-alkyl and β-aryl substituted of β-aminoacrylic acid have been measured. The results are evidence of the strong intramolecular hydrogen bond between amino group and carbonyl oxygen. The activation energy of about 20 kcal/mol was obtained for the internal rotation around C-N bond.
ISSN:0038-7010
1532-2289
DOI:10.1080/00387019108018161