. Can. J. Chem. 60, 106 (1982). The I7O nuclear magnetic resonance shifts of dialkylethers are linearly related to the electron populations on the oxygen atoms, in a range covering L -130 ppm, showing that any increase of electronic charge at the oxygen atom is accompanied by a downfield nmr shift. The opposite trend is observed for the oxygen atoms of ketones and aldehydes.MARIE-THERESE BERALDIN. EDOUARD VAUTHIER et SANDOR FLISZLR. Can. J. Chem. 60, 106 (1982). Les deplacements chimiques des noyaux I7O dans les ethers aliphatiques sont lineairement relies aux populations electroniques des atomes d'oxygene, dans un domaine couvrant L -130 ppm, toute augmentation de population electronique se manifestant par un deplacement vers les champs faibles. L'effet oppose est observe pour l'oxygene des cetones et des aldehydes.
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