Organoactinides in the polymerization of ethylene: is TIBA a better cocatalyst than MAO?
The synthesis of two pyridylamidinate bis(N,N'-bis(trimethylsilyl)-2-pyridylamidinate)An(μ-Cl)2Li(TMEDA) (An = U (1), Th (2)) complexes is presented. For complex 1 the solid state X-ray structures were studied and compared to that of complex 2. The organoactinide complexes were studied as pre-c...
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| Veröffentlicht in: | Dalton transactions : an international journal of inorganic chemistry 2013-07, Vol.42 (25), p.9069-9078 |
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| container_title | Dalton transactions : an international journal of inorganic chemistry |
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| creator | Domeshek, Elena Batrice, Rami J Aharonovich, Sinai Tumanskii, Boris Botoshansky, Mark Eisen, Moris S |
| description | The synthesis of two pyridylamidinate bis(N,N'-bis(trimethylsilyl)-2-pyridylamidinate)An(μ-Cl)2Li(TMEDA) (An = U (1), Th (2)) complexes is presented. For complex 1 the solid state X-ray structures were studied and compared to that of complex 2. The organoactinide complexes were studied as pre-catalysts in the polymerization of ethylene when activated by methylalumoxane (MAO). The catalytic activity was improved using a mixture of trityl tetrakispentafluorophenylborate (TTPB) and a small amount of methylalumoxane (MAO) as cocatalysts, and was amazingly improved, providing the greatest activity, using only triisobutyl aluminum (TIBA). We present a combination of ESR, C60 radical trapping, and MALDI-TOF studies describing the formation of the single-site active species, capturing some unique features of the complexes and shedding light on the polymerization mechanism. |
| doi_str_mv | 10.1039/c3dt00032j |
| format | Article |
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For complex 1 the solid state X-ray structures were studied and compared to that of complex 2. The organoactinide complexes were studied as pre-catalysts in the polymerization of ethylene when activated by methylalumoxane (MAO). The catalytic activity was improved using a mixture of trityl tetrakispentafluorophenylborate (TTPB) and a small amount of methylalumoxane (MAO) as cocatalysts, and was amazingly improved, providing the greatest activity, using only triisobutyl aluminum (TIBA). 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| ispartof | Dalton transactions : an international journal of inorganic chemistry, 2013-07, Vol.42 (25), p.9069-9078 |
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| source | MEDLINE; Royal Society Of Chemistry Journals 2008-; Alma/SFX Local Collection |
| subjects | Actinoid Series Elements - chemistry Aluminum Buckminsterfullerene Catalysis Ethylene Ethylenes - chemistry Fullerenes Lithium - chemistry Models, Molecular Molecular Structure Organometallic Compounds - chemical synthesis Organometallic Compounds - chemistry Polymerization Radicals Synthesis Uranium - chemistry X-rays |
| title | Organoactinides in the polymerization of ethylene: is TIBA a better cocatalyst than MAO? |
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