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Bis(2-(6-methylpyridin-2-yl)-benzimidazolyl)titanium dichloride and titanium bis(6-benzimidazolylpyridine-2-carboxylimidate): Synthesis, characterization, and their catalytic behaviors for ethylene polymerization
Liu, Shaofeng1,2; Zuo, Weiwei1,2; Zhang, Shu1,2; Hao, Peng1,2; Wang, Deligeer1,2,3; Sun, Wen-Hua1,2
2008-05-15
Source PublicationJOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
ISSN0887-624X
Volume46Issue:10Pages:3411-3423
AbstractA series of 6-(benzimidazol-2-yl)-N-organylpyridine-2-carboxamide were synthesized and transformed into 6-benzimidazolylpyridine-2-carboxylimidate as dianionic tridentate ligands. Bis(2-(6-methylpyridin-2-yl)-benzimidazolyl)titanium dichloride (Cl) and titanium bis(6-benzimidazolylpyridine-2-carboxylimidate) (C2-C8) were synthesized in acceptable yields. These complexes were systematically characterized by elemental and NMR analyses. Crystallographic analysis revealed the distorted octahedral geometry around titanium in both complexes C1 and C4. Using MAO as cocatalyst, all complexes exhibited from good to high catalytic activities for ethylene polymerization. The neutral bis(6-benzimidazolylpyridine-2-carboxylimidate)titanium (C2-C8) showed high catalytic activities and good stability for prolonged reaction time and elevated reaction temperature; however, C1 showed a short lifetime in catalysis as being observed at very low activity after 5 min. The elevated reaction temperature enhanced the productivity of polyethylenes with low molecular weights, whereas the reaction with higher ethylene pressure resulted in better catalytic activity and resultant polyethylenes with higher molecular weights. At higher ratio of MAO to titanium precursor, the catalytic system generated better activity with producing polyethylenes with lower molecular weights. (C) 2008 Wiley Periodicals, Inc.
KeywordCatalysis Polyethylene 6-benzimidazolylpyridyl-2-carboxylimidate Titanium X-ray
DOI10.1002/pola.22694
Indexed BySCI
Language英语
WOS IDWOS:000256028600023
PublisherWILEY-BLACKWELL
Citation statistics
Cited Times:26[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/65718
Collection工程塑料实验室
中国科学院化学研究所
Corresponding AuthorSun, Wen-Hua
Affiliation1.Chinese Acad Sci, Key Lab Engn Plast, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, Beijing 100190, Peoples R China
3.Inner Mongolia Normal Univ, Dept Chem, Hohhot 010022, Peoples R China
Recommended Citation
GB/T 7714
Liu, Shaofeng,Zuo, Weiwei,Zhang, Shu,et al. Bis(2-(6-methylpyridin-2-yl)-benzimidazolyl)titanium dichloride and titanium bis(6-benzimidazolylpyridine-2-carboxylimidate): Synthesis, characterization, and their catalytic behaviors for ethylene polymerization[J]. JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,2008,46(10):3411-3423.
APA Liu, Shaofeng,Zuo, Weiwei,Zhang, Shu,Hao, Peng,Wang, Deligeer,&Sun, Wen-Hua.(2008).Bis(2-(6-methylpyridin-2-yl)-benzimidazolyl)titanium dichloride and titanium bis(6-benzimidazolylpyridine-2-carboxylimidate): Synthesis, characterization, and their catalytic behaviors for ethylene polymerization.JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,46(10),3411-3423.
MLA Liu, Shaofeng,et al."Bis(2-(6-methylpyridin-2-yl)-benzimidazolyl)titanium dichloride and titanium bis(6-benzimidazolylpyridine-2-carboxylimidate): Synthesis, characterization, and their catalytic behaviors for ethylene polymerization".JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY 46.10(2008):3411-3423.
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