%0 Journal Article %A Nifant’ev, Ilya E. %A Ivchenko, Pavel V. %A Bagrov, Vladimir V. %A Nagy, Sandor M. %A Mihan, Shahram %A Winslow, Linda N. %A Churakov, Andrei V. %D 2013 %T Reaction of 2,8-Bis(o‑hydroxyaryl)quinolines with Group 4 Metal Alkyls Resulting in Three Distinct Coordination Modes of the Tridentate Ligand. X‑ray Structure of Complexes and Performance as Precursors in Ethylene Polymerization Catalysis %U https://acs.figshare.com/articles/journal_contribution/Reaction_of_2_8_Bis_i_o_i_hydroxyaryl_quinolines_with_Group_4_Metal_Alkyls_Resulting_in_Three_Distinct_Coordination_Modes_of_the_Tridentate_Ligand_X_ray_Structure_of_Complexes_and_Performance_as_Precursors_in_Ethylene_Polymerization_Catalysis/2415979 %R 10.1021/om4001555.s001 %2 https://acs.figshare.com/ndownloader/files/4057177 %K 4 mol %K Distinct Coordination Modes %K Ethylene Polymerization CatalysisA series %K polymerization catalysts %K Tridentate Ligand %K MAO %K group 4 tetrabenzyl complexes MBn 4 results %K polyethylene copolymers %K multimodal MWDs %K bi %K ZrCl 4. %K amine complexes %K benzyl substitution %K ligand precursors %K amide complexes %K complexes result %K Group 4 Metal Alkyls Resulting %K azine fragment %X A series of bis­(o-hydroxyphenyl)­quinolines have been prepared, starting from 2,8-dibromoquinoline. Reaction of these new ligand precursors with group 4 tetrabenzyl complexes MBn4 results in benzyl substitution of the azine fragment with the formation of amide complexes (M = Ti) or amine complexes with an N–H fragment coordinated to the metal (M = Zr, Hf). The third structural typeZr complexes where the aromatic system of the precursor remains intactcan be prepared through the reaction of the bis­(o-hydroxyphenyl)­quinolones with 4 mol of methyllithium, followed by ZrCl4. The new complexes result in active polymerization catalysts when activated with MAO/borate cocatalysts on silica supports, resulting in polyethylene copolymers with very high molecular weights and multimodal MWDs. %I ACS Publications