2-{2,6-Bis[bis(4-fluorophenyl)methyl]-4-chlorophenylimino} -3-aryliminobutylnickel(II) bromide complexes: Synthesis, characterization, and investigation of their catalytic behavior

Liu, Qingyun; Zhang, Wenjuan; Jia, Dedong; Hao, Xiang; Redshaw, Carl; Sun, Wen-Hua

Abstract

The series of 2-{2,6-bis[di(4-fluorophenyl)methyl]-4-chlorophenylimino}-3- aryliminobutane derivatives (L1-L5) and their nickel(II) dibromide complexes (Ni1-Ni5) were synthesized, and all organic compounds were fully characterized by the Fourier transform infrared (FT-IR) and nuclear magnetic resonance (NMR) spectroscopy and by elemental analysis, while the nickel complexes were characterized by FT-IR spectroscopy, elemental analysis, as well as by single-crystal X-ray diffraction for two representative examples, namely Ni1 and Ni4. A distorted tetrahedral geometry was observed for these four-coordinate nickel complexes. Upon the activation with either Methylaluminoxane or modified methylaluminoxane as co-catalyst, all nickel complex precatalysts showed very high activity toward ethylene polymerization with activities of up to 10 7 g(PE)·mol -1 (Ni)·h -1 , and afforded highly branched polyethylene with a bimodal distribution. © 2014 Elsevier B.V.

Citation

Liu, Q., Zhang, W., Jia, D., Hao, X., Redshaw, C., & Sun, W. (2014). 2-{2,6-Bis[bis(4-fluorophenyl)methyl]-4-chlorophenylimino} -3-aryliminobutylnickel(II) bromide complexes: Synthesis, characterization, and investigation of their catalytic behavior. Applied catalysis. A, General, 475(April), 195-202. https://doi.org/10.1016/j.apcata.2014.01.034

• Journal Article Type: Article
• Acceptance Date: Jan 16, 2014
• Online Publication Date: Jan 24, 2014
• Publication Date: Apr 5, 2014
• Deposit Date: Jun 24, 2015
• Publicly Available Date: Jun 24, 2015
• Journal: Applied catalysis A : general
• Print ISSN: 0926-860X
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 475
• Issue: April
• Pages: 195-202
• DOI: https://doi.org/10.1016/j.apcata.2014.01.034
• Keywords: α-Diiminonickel complex, Bulky unsymmetrical 2,3-diiminobutane, Ethylene polymerization, Highly branched polyethylene
• Public URL: https://hull-repository.worktribe.com/output/375753
• Publisher URL: http://www.sciencedirect.com/science/article/pii/S0926860X14000404
• Additional Information: Author's accepted manuscript of article published in: Applied catalysis A : general, 2014, v.475, April.