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- W1990685681 abstract "Abstract The proton magnetic resonance of aqueous N-methylpropionamide solutions has been studied as a function of the mole fraction of water and as a function of temperature. Shifts to lower applied magnetic fields with a decrease in temperature were observed for both water and NH proton resonances. An increase in water concentration was found to produce a high field shift in the NH proton resonance indicative of a net hydrogen-bond structure breaking effect. The other proton containing groups of N-methylpropionamide were only slightly affected by changes in temperature and concentration. The NMR data indicate that the addition of N-methylpropionamide to water produces an initial structure-making effect in water with a maximum at approximately 0.85 mole fraction of water. The further addition of the organic component to water produces a structure breaking effect with respect to water. The structure of these solutions as obtained from NMR techniques is compared to that suggested from density measurements." @default.
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- W1990685681 date "1970-07-01" @default.
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- W1990685681 title "NMR studies of the structure of aqueous solutions—I. The aqueous N-methylpropionamide system" @default.
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- W1990685681 doi "https://doi.org/10.1016/0584-8539(70)80200-8" @default.
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