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4670451 
Journal Article 
Half-titanocene complexes bearing bulky dibenzhydryl-substituted aryloxide ligand: Syntheses, characterization, and ethylene (Co-) polymerization behaviors 
Dong, Bo; Zhang, H; Li, Hua; Liu, H; Guo, Jun; Zhang, C; Zhang, Xu; Hu, Y; Sun, G; Zhang, X 
2016 
1 
Polymer
ISSN: 0032-3861 
100 
188-193 
WOS:000383925800023 
Three half-titanocene complexes 2a-3a bearing dibenzhydryl-substituted aryloxide ligands CpTiCl2(O-2,6-Ph2CH-C6H2-4-Me), 2a; CpTiCl2 (O-2,6-Ph2CH-C6H2-4-OMe), 2b; Cp*TiCl2(O-2,6-Ph2CH-C6H2-4-Me), 3a were synthesized. All the complexes were characterized by NMR spectroscopy and elemental analysis. The molecular structures of complex 2a and 2b were further determined by single crystal X-ray diffraction, both of them adopt a three-legged distorted tetrahedral geometry in which the aryl substituents are orthogonally to the aryloxide group. Activated by methylaluminoxane (MAO), these complexes showed high activities (up to 2100 kg mol-(1) (Ti) h(-1)) for ethylene polymerization. The resultant polyethylenes had high molecular weight and narrow molecular weight distributions. Furthermore, for the ethylene/1-hexene copolymerization, these complexes exhibited moderate activites and moderate to high 1-hexene incorporation ability. The sequence distributions of poly (ethylene-co-1-hexene)s are greatly influenced by the substituent on the cyclopentadineyl group of titanium complexes. (C) 2016 Elsevier Ltd. All rights reserved. 
Bulky aryloxide; Half-titanocene complexes; Ethylene polymerization; Copolymerization