545445-85-0Relevant academic research and scientific papers
Effects of pendant ligand binding affinity on chain transfer for 1-hexene polymerization catalyzed by single-site zirconium amine bis-phenolate complexes
Steelman, D. Keith,Xiong, Silei,Pletcher, Paul D.,Smith, Erin,Switzer, Jeffrey M.,Medvedev, Grigori A.,Delgass, W. Nicholas,Caruthers, James M.,Abu-Omar, Mahdi M.
, p. 6280 - 6288 (2013/06/26)
The kinetics of 1-hexene polymerization using a family of five zirconium amine bis-phenolate catalysts, Zr[tBu-ONXO]Bn2 (where X = THF (1), pyridine (2), NMe2 (3), furan (4), and SMe (5)), has been investigated to uncover
Comparison of selected zirconium and hafnium amine bis(phenolate) catalysts for 1-hexene polymerization
Steelman, D. Keith,Pletcher, Paul D.,Switzer, Jeffrey M.,Xiong, Silei,Medvedev, Grigori A.,Delgass, W. Nicholas,Caruthers, James M.,Abu-Omar, Mahdi M.
supporting information, p. 4862 - 4867 (2013/09/24)
The kinetics of 1-hexene polymerization using a family of three zirconium and hafnium amine bis-phenolate catalysts, M[t-Bu-ONXO]Bn2 (where M = Zr (a) or Hf (b), and X = THF (1), pyridine (2), or NMe2 (3)), have been inves
Group IV complexes of an amine bis(phenolate) ligand featuring a THF sidearm donor: From highly active to living polymerization catalysts of 1-hexene
Groysman, Stanislav,Goldberg, Israel,Kol, Moshe,Genizi, Elisheva,Goldschmidt, Zeev
, p. 137 - 144 (2008/10/08)
A new amine bis(phenolate) ligand bearing a THF donor on a sidearm and several dialkyl complexes of the group IV triad are introduced. The crystal structures of a zirconium dibenzyl complex and a titanium dibenzyl complex were solved, and revealed a strong binding of the oxygen donor of the THF group to the metal center. Upon activation with tris(pentafluorophenyl)borane the zirconium and the hafnium dibenzyl complexes lead to highly active 1-hexene polymerization catalysts. In comparison, titanium complexes (a dibenzyl complex and a dimethyl complex) lead to slower but living polymerization of 1-hexene at room temperature. Polymerization of neat 1-hexene under high dilution conditions was found to be living for an exceptionally long time of 6 days, leading to poly(1-hexene) of Mw=816 000 and PDI=1.09. A block copolymerization of 1-hexene and 1-octene at room temperature could be obtained using the titanium catalysts.
