title: 17O NMR spectra of alpha-diesters.
abstract: 17O NMR spectra of title compounds were measured at natural abundance in acetonitrile solutions. Intercarbonyl dihedral angles have been estimated by molecular mechanics, which show invariance except in one case. Because of this invariance, contrary to other alpha-dicarbonyl compounds, a correlation between chemical shifts and dihedral intercarbonyl angles could not be developed. Spectroscopic and computational results allowed us to evaluate other conformational features.
authors.affiliation: Dipartimento Farmaco Chimico Tecnologico, Università di Cagliari, Via Ospedale, 72, I-09124 Cagliari, Italy. cerioni@unica.it
authors.forename: Giovanni
authors.initials: G
authors.lastname: Cerioni
authors.forename: Gianluca
authors.initials: G
authors.lastname: Uccheddu
mesh_terms: D004952:Esters / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D010103:Oxygen Isotopes
chemical_list: D004952:Esters; D010103:Oxygen Isotopes