Ionic liquids are salts with low melting point (<100 °C) having enormous potential for industrial use as “green” replacements for harmful volatile organic solvents. Especially, imidazolium ionic liquids are used in a wide variety of applications due to their attractive physical and chemical properties. In this final work, the ultimate goal was the synthesis of new quaternary salts of 1,2-dimethylimidazole. These compounds are prepared by reaction of 1,2-dimethylimidazole with hydrogen peroxide into 1,2-dimethylimidazole-N-oxide [1] which was further transformed into compounds 1- butoxy-2,3-dimethylimidazolium bromide [2] and 1-(2-hydroxyethyloxy)-2,3- dimethyilimidazolium chloride [3]. Structures of novel, yet unpublished compounds [1]-[3] were determined according to the data obtained by IR-spectroscopy as well as 1H- and 13 C-nuclear magnetic resonance.