Organoactinides in the polymerization of ethylene: Is TIBA a better cocatalyst than MAO?

Elena Domeshek; Rami J. Batrice; Sinai Aharonovich; Boris Tumanskii; Mark Botoshansky; Moris S. Eisen

doi:10.1039/c3dt00032j

Organoactinides in the polymerization of ethylene: Is TIBA a better cocatalyst than MAO?

Elena Domeshek, Rami J. Batrice, Sinai Aharonovich, Boris Tumanskii, Mark Botoshansky, Moris S. Eisen^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	9069-9078
Number of pages	10
Journal	Dalton Transactions
Volume	42
Issue number	25
DOIs	https://doi.org/10.1039/c3dt00032j
State	Published - 7 Jul 2013
Externally published	Yes

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title = "Organoactinides in the polymerization of ethylene: Is TIBA a better cocatalyst than MAO?",

abstract = "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.",

author = "Elena Domeshek and Batrice, {Rami J.} and Sinai Aharonovich and Boris Tumanskii and Mark Botoshansky and Eisen, {Moris S.}",

year = "2013",

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doi = "10.1039/c3dt00032j",

language = "英语",

volume = "42",

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journal = "Dalton Transactions",

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TY - JOUR

T1 - Organoactinides in the polymerization of ethylene

T2 - Is TIBA a better cocatalyst than MAO?

AU - Domeshek, Elena

AU - Batrice, Rami J.

AU - Aharonovich, Sinai

AU - Tumanskii, Boris

AU - Botoshansky, Mark

AU - Eisen, Moris S.

PY - 2013/7/7

Y1 - 2013/7/7

N2 - 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.

AB - 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.

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U2 - 10.1039/c3dt00032j

DO - 10.1039/c3dt00032j

M3 - 文章

C2 - 23571502

AN - SCOPUS:84878709388

SN - 1477-9226

VL - 42

SP - 9069

EP - 9078

JO - Dalton Transactions

JF - Dalton Transactions

IS - 25

ER -

Organoactinides in the polymerization of ethylene: Is TIBA a better cocatalyst than MAO?

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