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- W2052449306 abstract "Abstract The proton nuclear magnetic resonance spectra (NMR) of a homologous series of alkynoic fatty esters having the terminal portion of methyl 9-octadecynoate and proximal methylenes varying from one to seven were studied. The previously designated anomalous lines in the NMR spectra of alkynoic acids have been assigned to the proximal internal protons. The change of shape of the lines is attributable to virtual coupling of the proximal internal protons. The chemical shift of the lines is shown to arise as a result of the deshielding of the proximal internal protons by the lateral deshielding zones of the carboxyl group acting in concert with the deshielding effect of the triple bond. The direct change in peak intensity of lines results from the change in the number of proximal internal protons." @default.
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- W2052449306 date "1972-12-01" @default.
- W2052449306 modified "2023-09-27" @default.
- W2052449306 title "Assignment of the anomalous lines in the proton nuclear magnetic resonance spectra of alkynoic fatty acids and esters" @default.
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- W2052449306 doi "https://doi.org/10.1016/0009-3084(72)90018-7" @default.
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