Abstract
A series of heterobimetallic Zr–Al complexes, [ZrCl{(O-2,4-tBu2C6H2-6-CH2)3(μ2-O-2,4-tBu2-C6H2-6-CH2)}N][R2Al(μ2-OiPr)] [R = Me (3), Et (4)] and [ZrR{(O-2,4-tBu2C6H2-6-CH2)3(μ2-O-2,4-tBu2-C6H2-6-CH2)}N][R2Al(μ2-OiPr)] [R = Et (5), iBu (6)], have been prepared by reactions of Zr(OiPr)[(O-2,4-tBu2C6H2-6-CH2)3N] (1) with 1.0 equiv of Al alkyls (Me2AlCl, Et2AlCl, AlEt3, and AliBu3), and their structures (3, 5, 6) were determined by X-ray crystallography. The isobutyl complex (6) is stable in C6D6 and toluene-d6 at 45 °C; the thermolysis of 6 at >60 °C gradually afforded 1 with liberation of AliBu3. These complexes exhibited remarkable catalytic activities for ethylene polymerization at 80–120 °C in the presence of MAO; only complex 6 exhibited the high activity even at 45–60 °C.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
