Abstract: ¹H NMR spectra of acetoxime have been measured as the function of the molar concentration of acetoxime in solvent of carbon tetrachloride,chloroform、dichloromethane、benzene and toluene.It has been found that the chemical shifts of the resonance absorption lines of the two methyl groups in acetoxime and of methine halide move upfield gradually as the molar concentration of acetoxime increascs, but the resonance absorption line of hydroxyl group in acetoxime movc downfield gradually. The absorption line of the two methyl groups in acetoxime shows a singlet.
In the solvent of aromatic hydrocarbons, the resonanee absorption lines of the two methyl groups in acetoxime and of aromatic hydrocarbons move downfield gradually as the molar concentration of acetoxime increases, and the absorption line of the two methyl groups in acetoxime splits to a doublet. At the same time, it has been found that all the chemical shifts show linear relation with the molar concentration of acetoxime.

Key words: ¹H NMR, Solvent effects, Linear relation, Chemical shifts