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Study on the Interactions Between Diacetyl Monoxime and Benzene by 1H NMR

Wang Yimin (Department of Chemistry, Anhui University) Ke Yuping (University of Science and Technology of China)  
This article deals with the 1H NMR of diacetyl monoxime in a mixed solvent of benzene and carbon tetrachloride, It has been found that the chemical shifts of the resonance absorption lines of the two methyl groups in diacetyl monoxime and that of benzene in the mixed solvent move upfield gradually, as the mole fraction of benzene in the mixed solvent increses. And the rates of upfield shifts of the resonance absorption lines of the two methyl groups are different. Δδ of α CH 3 is larger than that of β CH 3. The chemical shifts of α CH 3 and benzene in the mixed solvent have linear relations with the mole fraction of benzene. and can be showed with a equation (δ=Ax+B),Where x is the mole fraction of benzene in the mixed solvent. The correlation coefficients R are approximately equal to -1.
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