Oxide halides of molybdenum and tungsten. I. Preparations

Abstract

New preparations of molybdenum oxide tetrachloride, MoOCl₄; tungsten oxide tetrachloride, WOCl₄; molybdenum oxide trichloride, MoOCl₃; molybdenum dioxide dibromide, MoO₂Br₂; and molybdenum oxide tribromide, MoOBr₃, have been developed. It has been shown that all previous preparations of molybdenum pentachloride apparently contained some oxide tetrachloride. The magnetic susceptibility of pure molybdenum pentachloride has been measured over a temperature range.