Abstract: This article studies the solvent effect of benzene on dimethyl dimethylthiomethylenemalonate in carbon tetrachloride. It was found that chemical shifts of the methyl protons of the title compound and that of benzene move to upfield gradually, as the mole fraction of benzene in the mixed solvent increases, meanwhile the resonance absorption line of the solvent of benzene is a sharp single line. At the same time, it was found that the chemical shifts of the methyl protons of the title compound and that of benzene in the mixed solvent show linear relation ship with the mole fraction of benzene in the mixed solvent.

Key words: Dimethyl dimethylthiomethylenemalonate, ¹H NMR chemical shifts, Mixed solvent