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- W2065206963 abstract "A method is described which allows the determination of the angle θb between the direction of the dipole moment of a base and that of the lone pair of electrons which may be involved in H-bond formation. The method utilizes the experimental values of the dipole moments of the complexes and of the separate components. The dipole increment is estimated from the correlation between this quantity and the enthalpy of the hydrogen bond. The method is applied to two bases: β-dimethylaminopropiophenone and 3-dimethyl-amino-1-phenyl-2-propene-1-one which are complexes by some nine phenols. In the former case the mean value of cos θb is found to be −0.10 ± 0.05, demonstrating that H-bond formation occurs on the lone pair of the N atom of the amino ketone. In the latter case the mean value of cos θbis 0.47 ± 0.10, indicating that complexation of the enamino ketone involves mainly the C=O group, both lone pairs of electrons of this group being active to approximately the same extent." @default.
- W2065206963 created "2016-06-24" @default.
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- W2065206963 date "1982-09-01" @default.
- W2065206963 modified "2023-09-27" @default.
- W2065206963 title "Structural differences between hydrogen-bonded complexes of enamino ketones and amino ketones in benzene solution" @default.
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- W2065206963 doi "https://doi.org/10.1016/0022-2860(82)85118-1" @default.
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