%0 Journal Article
%A Kanai, Yuki
%A Foro, Sabine
%A Plenio, Herbert
%D 2019
%T Bispentiptycenyl–Diimine–Nickel Complexes
for Ethene Polymerization and Copolymerization with Polar Monomers
%U https://acs.figshare.com/articles/journal_contribution/Bispentiptycenyl_Diimine_Nickel_Complexes_for_Ethene_Polymerization_and_Copolymerization_with_Polar_Monomers/7579733
%R 10.1021/acs.organomet.8b00836.s001
%2 https://acs.figshare.com/ndownloader/files/14077622
%K Ni
%K polymer
%K Et 2 AlCl
%K diimine ligand
%K Et 2 AlCl activator
%K polymerization
%K Ethene Polymerization
%K M n
%K molar ratio
%K ethene
%K T m
%K comonomer
%X Ni2+ coordinated within a bowl-shaped diimine ligand
with two pentiptycenyl-substituents [(diimine)NiBr2] displays
excellent activity for the polymerization of ethene (7 atm) with activities
of up to 34 × 103 kg(mol Ni)−1 h–1 following activation with Et2AlCl. The
resulting polymer is characterized by high molecular weights (Mn = 150 × 103 g·mol–1), low branching (12/1000 C), and a high melting point
(Tm = 133 °C). The polymerization
of ethene with polar comonomers leads to the formation of the respective
polar polymers with very efficient incorporation of comonomer. The
activity of the catalyst critically depends on the molar ratio of
Et2AlCl activator and the polar functional group.
%I ACS Publications