Charge distribution in 1,1-dicyano-2-arylethenes: An undergraduate experiment utilizing the Knoevenagel condensation and NMR spectroscopy

The hydrogen and carbon 13 NMR spectra of 1,1-dicyano-2-arylethenes empirically reveal the positions in the unsaturated side chain most affected by conjugation with the aromatic ring. An experiment utilizing the Knoevenagel condensation and NMR spectroscopy is described.

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Bibliographic Details
Published in:Journal of chemical education 1995-06, Vol.72 (6), p.548
Main Author: Rowland, Alex T
Format: Article
Language:English
Subjects:
Aromatic compounds
Carbon 13
Charge distribution
Chemistry
Condensation
Conjugation
Lesson plans
Logical Thinking
NMR
NMR spectroscopy
Nuclear magnetic resonance
Organic Chemistry
Research Methodology
Spectroscopy
Water
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Description
Summary:The hydrogen and carbon 13 NMR spectra of 1,1-dicyano-2-arylethenes empirically reveal the positions in the unsaturated side chain most affected by conjugation with the aromatic ring. An experiment utilizing the Knoevenagel condensation and NMR spectroscopy is described.
ISSN:0021-9584
1938-1328