%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
typeZr complexes where the aromatic system of the precursor
remains intactcan 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