The present invention is directed to a coordinating catalyst system comprising at least one bidentate or tridentate ligand containing pre-catalyst transition metal compound, (e.g., 2,6-bis (2,4,6-trimethylarylamino)pyridyl iron dichloride), at least one support-activator (e.g., spray dried silica/clay...http://www.google.de/patents/US6399535?utm_source=gb-gplus-sharePatent US6399535 - Coordination catalyst systems employing agglomerated metal oxide/clay support-activator and method of their preparation
