VT H-1 NMR investigations of resonance-assisted intramolecular hydrogen bonding in 4-(dimethylamino)-2 '-hydroxychalcone

Authors
Wachter-Jurcsak, N Detmer, CA
Citation
N. Wachter-jurcsak et Ca. Detmer, VT H-1 NMR investigations of resonance-assisted intramolecular hydrogen bonding in 4-(dimethylamino)-2 '-hydroxychalcone, ORG LETT, 1(5), 1999, pp. 795-798
Citations number
22
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
ORGANIC LETTERS
ISSN journal
15237060 → ACNP
Volume
1
Issue
5
Year of publication
1999
Pages
795 - 798
Database
ISI
SICI code
1523-7060(19990909)1:5<795:VHNIOR>2.0.ZU;2-W
Abstract
[GRAPHICS] Resonance assisted intramolecular hydrogen bonding in both polar aprotic an d nonpolar solutions of 4-(dimethylamino)-2'-hydroxychalcone (DMAHC) has be en investigated by variable temperature proton NMR spectroscopy. In both no npolar and polar solvents, the signal for the phenolic hydrogen moves downf ield as the temperature is lowered. In each solvent system studied, a linea r relationship between chemical shift and temperature was observed.