Mononuclear complexes with heterocyclic ligands as ethylene polymerization catalysts for single-reactor bimodal polyethylene technology

27 bis(benzimidazolyl) complexes of Ti, Zr and V have been prepared, characterized and tested for catalytic ethylene polymerization after activation with methylalumoxane (MAO). Structure-property-relationship studies show a strong influence of the bridging unit B on the performance of the catalysts. Most of the produced polyethylenes show bimodal molecular weight distributions.48