Title of article :
Rates of Acid-Catalyzed NH Proton Exchange of Enaminones, an 1H NMR Study
Author/Authors :
Shaabani, Ahmad Department of Chemistry - Shahid Beheshti University - Tehran , Sadeghi Nejadt, Faiezeh Department of Chemistry - Shahid Beheshti University - Tehran , Yavari, Issa Department of Chemistry - Tarbiat Modarres University - Tehran
Abstract :
1H NMR spectra of a series of enaminones R-CO-CH=C(NHCH2Ph)-R [1, R=CH3; 2, R=C6H5; 3, R=CF3; 4, R=CH2CH2CH2; 5, R=CH2C(CH3)2CH2], were obtained in the presence of trifluoroacetic acid in CDCl3 or DMSO-d6 at 28 °C. Steric, solvent, electronic and hydrogen bonding effects on the rates of acid-catalyzed NH proton exchanges were investigated. Rate constants were calculated by 1H NMR line shape analysis.
Keywords :
Enaminones , Rate constants , Dynamic NMR spectroscopy , Acid-catalyzed proton exchange , Proton exchange reaction
Journal title :
Astroparticle Physics
