Iron-based catalysts bearing bis(imido)-pyridine ligands for the polymerization of tert-butyl acrylate

被引:24
作者
Castro, PM
Lappalainen, K
Ahlgrén, M
Leskelä, M
Repo, T
机构
[1] Univ Helsinki, Dept Chem, Inorgan Chem Lab, FIN-00014 Helsinki, Finland
[2] Univ Joensuu, Dept Chem, FIN-80101 Joensuu, Finland
关键词
transition metal chemistry; organometallic catalysts; crystal structures; polar monomer; atactic;
D O I
10.1002/pola.10674
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Iron(II) dichloride complexes bearing a tridentate nitrogen donor ligand were investigated for the homopolymerization of tert-butyl acrylate after activation with methylaluminoxane. Two new complexes were synthesized, 2,6-bis[1-(cyclohex-ylimido)ethyl]pyridine iron chloride (FeCl2) and 2,6-bis[1-(isopropylimido)ethyl]pyridine FeCl2, and the single-crystal X-ray structure of the latter one was determined. Turnover frequencies of the catalysts during polymerization ranged from 36 to 241 cycles/mol/h. The obtained polymers exhibited weight-average molecular weights ranging from 24,000 to 438,500 g/mol, and the molar mass distribution varied between 1.8 and 4.3. Activity of the catalytic system and the molar mass of the polymer are influenced by the ligand structure of the complexes as well as other polymerization conditions such as monomer concentration and temperature. (C) 2003 Wiley Periodicals, Inc.
引用
收藏
页码:1380 / 1389
页数:10
相关论文
共 34 条
[1]   New bis(imino)pyridine-iron(II)- and cobalt(II)-based catalysts:: synthesis characterization and activity towards polymerization of ethylene [J].
Abu-Surrah, AS ;
Lappalainen, K ;
Piironen, U ;
Lehmus, P ;
Repo, T ;
Leskelä, M .
JOURNAL OF ORGANOMETALLIC CHEMISTRY, 2002, 648 (1-2) :55-61
[2]   Polymerization of methyl methacrylate and other polar monomers with alkylaluminum initiators bearing bidentate and tridentate N- and O-donor ligands [J].
Baugh, LS ;
Sissano, JA .
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, 2002, 40 (10) :1633-1651
[3]   Copolymerization of polar monomers with olefins using transition-metal complexes [J].
Boffa, LS ;
Novak, BM .
CHEMICAL REVIEWS, 2000, 100 (04) :1479-1493
[4]   Iron and cobalt ethylene polymerization catalysts bearing 2,6-bis(imino)pyridyl ligands:: Synthesis, structures, and polymerization studies [J].
Britovsek, GJP ;
Bruce, M ;
Gibson, VC ;
Kimberley, BS ;
Maddox, PJ ;
Mastroianni, S ;
McTavish, SJ ;
Redshaw, C ;
Solan, GA ;
Strömberg, S ;
White, AJP ;
Williams, DJ .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1999, 121 (38) :8728-8740
[5]   The nature of the active site in bis(imino)pyridine iron ethylene polymerisation catalysts [J].
Britovsek, GJP ;
Clentsmith, GKB ;
Gibson, VC ;
Goodgame, DML ;
McTavish, SJ ;
Pankhurst, QA .
CATALYSIS COMMUNICATIONS, 2002, 3 (05) :207-211
[6]   Cationic 2,6-bis(imino)pyridine iron and cobalt complexes: synthesis, structures, ethylene polymerisation and ethylene/polar monomer co-polymerisation studies [J].
Britovsek, GJP ;
Gibson, VC ;
Spitzmesser, SK ;
Tellmann, KP ;
White, AJP ;
Williams, DJ .
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS, 2002, (06) :1159-1171
[7]   Cationic alkyl aluminium ethylene polymerization catalysts based on monoanionic N,N,N-pyridyliminoamide ligands [J].
Bruce, M ;
Gibson, VC ;
Redshaw, C ;
Solan, GA ;
White, AJP ;
Williams, DJ .
CHEMICAL COMMUNICATIONS, 1998, (22) :2523-2524
[8]  
*BRUK AXS, 1998, SHELXTL V 5 1
[9]   Isotactic polymerization of tert-butyl acrylate with chiral zirconocene [J].
Deng, H ;
Soga, K .
MACROMOLECULES, 1996, 29 (05) :1847-1848
[10]  
DENG H, 1996, POLYM PREPR AM CHEM, V37, P283