Interaction of ethylaluminum dichloride with organic nitrogen and phosphorus compounds in three‐component polyolefin catalysts

Publisher Website
Google Scholar
Abstract
The chemistry of three‐component coordination catalysts for the polymerization of α‐olefins is very complex. The present investigation was initiated to elucidate the chemistry involved in the interaction of third‐component compounds such as hexamethylphosphoric triamide, tributylamine, triphenylphosphine, or dimethylformamide with ethylaluminum dichloride. The present chemical and spectral data demonstrate that ethylaluminum dichloride and third‐component compounds form stable complexes even at temperatures up to 100°C. in the absence of solvents or in homogeneous solutions. These data are in agreement with the fact that organoaluminum compounds form stable complexes with a variety of electron‐donor compounds. The ethylaluminum dichloride third‐component complexes in combination with titanium(III) chloride produce highly stereospecific catalysts for the polymerization of α‐olefins.