title: Carbon-13 nuclear magnetic resonance study of the alpha- and beta- isomers of methadol and acetylmethadol hydrochlorides.
abstract: The 13C-NMR spectra reported in these studies give direct evidence for the presence of two contributing conformers for alpha-methadol hydrochloride, alpha-acetylmethadol hydrochloride and beta-acetylmethadol hydrochloride. Indirect evidence is also available for the presence of more than one conformer for beta-methadol hydrochloride. However, in order to be more descriptive about the structures of the conformers, it is necessary to obtain 13C-NMR spectra that have a higher degree of resolution than is available from our present NMR system. Such systems are available, and plans are currently in progress to obtain 13C-NMR spectra or these compounds at high enough magnetic fields and low enough temperatures to give us the necessary data.
mesh_terms: D007536:Isomerism; D009682:Magnetic Resonance Spectroscopy; D008691:Methadone / Q000031:analogs & derivatives*; D008692:Methadyl Acetate / Q000031:analogs & derivatives* / Q000032:analysis*; D008968:Molecular Conformation; D012997:Solvents
chemical_list: D012997:Solvents; D008692:Methadyl Acetate; D008691:Methadone