Premium
Conformational analysis of rigid enol‐ethers by proton nuclear magnetic resonance
Author(s) -
Durand R.,
Geneste P.
Publication year - 1984
Publication title -
organic magnetic resonance
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0030-4921
DOI - 10.1002/mrc.1270220805
Subject(s) - enol , dihedral angle , chemistry , dipole , nuclear magnetic resonance , proton , magnetic dipole , proton magnetic moment , anisotropy , nuclear magnetic moment , chemical shift , physics , hydrogen bond , electron magnetic dipole moment , molecule , nuclear physics , organic chemistry , quantum mechanics , catalysis
Z , E isomers of rigid enol‐ethers were studied by proton nuclear magnetic resonance. As with oximes, it was found that the chemical shift difference (Δδ=δ z −δ E ) for the protons α to the function in question depends on the dihedral angle between the C α H and CC bonds. This phenomenon can be explained by an electric field effect and not by a magnetic anisotropy effect. The present study has allowed the derivation of values of the volume magnetic susceptibility and the product of b×the dipole moment for the CO bond.