Abstract
AbstractThe reported preparation of methyltitanium trichloride has been refined to give a product free of aluminum compounds. The infrared spectrum of this material in the 2–15 μ region was recorded, and suggested assignments for the various vibrations are given. Aluminum‐free methyltitanium trichloride is not a catalyst for the low‐pressure polymerization of ethylene, but it forms an active catalyst in the presence of its lower valence, thermal decomposition products. Mixtures of methyltitanium trichloride with vanadium tetrachloride or vanadium oxytrichloride lead to reduction of the vanadium valence and are active polymerization catalysts. In these bimetallic cases, polymer growth seems to occur at the vanadium center.
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