17O NMR spectra of alpha-diesters.
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.
Cerioni
Giovanni
G
Dipartimento Farmaco Chimico Tecnologico, Università di Cagliari, Via Ospedale, 72, I-09124 Cagliari, Italy. cerioni@unica.it
Uccheddu
Gianluca
G
D004952:Esters / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D010103:Oxygen Isotopes
D004952:Esters; D010103:Oxygen Isotopes