Preparation of a well-defined silica-supported nickel-diimine alkyl complex - application for the gas-phase polymerization of ethylene

A. Dorcier; N. Merle; M. Taoufik; F. Bayard; C. Lucas De Mallmann A.; J. M. Basset

doi:10.1021/om800582x

Preparation of a well-defined silica-supported nickel-diimine alkyl complex - application for the gas-phase polymerization of ethylene

A. Dorcier, N. Merle, M. Taoufik, F. Bayard, C. Lucas De Mallmann A., J. M. Basset

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

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Abstract

The interaction of [(Α-diimine)Ni(CH₂SiMe₃)2] (1) (α-diimine = 2,3-dimethyl-l,4-[(2,6)-diisopro-pylphenyl]-N,N -diazadiene) with the silanol =Si - OH groups of Aerosil Si0_2-(700) leads to the formation of the surface complex [≡SiO - Ni(a-diimine) (CH₂SiMe₃)] (2) with the concomitant emission of 1 mol equiv of SiMe₄ (TMS). The surface complex characterized by IR, chemical and mass balance analyses, solid-state NMR, and EXAFS has been activated by gaseous BF₃ to give an active gas-phase ethylene polymerization catalyst. The polymers thus obtained present a highly branched structure. The activity is attributed to the formation of the putative surface ion pair [≡SiOBF₃]^-[Ni(7alpha;-diimine)(CH ₂SiMe₃)]⁺.

Original language	English (US)
Pages (from-to)	2173-2178
Number of pages	6
Journal	Organometallics
Volume	28
Issue number	7
DOIs	https://doi.org/10.1021/om800582x
State	Published - Apr 13 2009
Externally published	Yes

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Organic Chemistry
Inorganic Chemistry

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@article{2654bc71de404efe93952ef965e36c79,

title = "Preparation of a well-defined silica-supported nickel-diimine alkyl complex - application for the gas-phase polymerization of ethylene",

abstract = "The interaction of [(Α-diimine)Ni(CH2SiMe3)2] (1) (α-diimine = 2,3-dimethyl-l,4-[(2,6)-diisopro-pylphenyl]-N,N -diazadiene) with the silanol =Si - OH groups of Aerosil Si02-(700) leads to the formation of the surface complex [≡SiO - Ni(a-diimine) (CH2SiMe3)] (2) with the concomitant emission of 1 mol equiv of SiMe4 (TMS). The surface complex characterized by IR, chemical and mass balance analyses, solid-state NMR, and EXAFS has been activated by gaseous BF3 to give an active gas-phase ethylene polymerization catalyst. The polymers thus obtained present a highly branched structure. The activity is attributed to the formation of the putative surface ion pair [≡SiOBF3]-[Ni(7alpha;-diimine)(CH 2SiMe3)]+.",

author = "A. Dorcier and N. Merle and M. Taoufik and F. Bayard and {De Mallmann A.}, {C. Lucas} and Basset, {J. M.}",

year = "2009",

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doi = "10.1021/om800582x",

language = "English (US)",

volume = "28",

pages = "2173--2178",

journal = "Organometallics",

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publisher = "American Chemical Society",

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T1 - Preparation of a well-defined silica-supported nickel-diimine alkyl complex - application for the gas-phase polymerization of ethylene

AU - Dorcier, A.

AU - Merle, N.

AU - Taoufik, M.

AU - Bayard, F.

AU - De Mallmann A., C. Lucas

AU - Basset, J. M.

PY - 2009/4/13

Y1 - 2009/4/13

N2 - The interaction of [(Α-diimine)Ni(CH2SiMe3)2] (1) (α-diimine = 2,3-dimethyl-l,4-[(2,6)-diisopro-pylphenyl]-N,N -diazadiene) with the silanol =Si - OH groups of Aerosil Si02-(700) leads to the formation of the surface complex [≡SiO - Ni(a-diimine) (CH2SiMe3)] (2) with the concomitant emission of 1 mol equiv of SiMe4 (TMS). The surface complex characterized by IR, chemical and mass balance analyses, solid-state NMR, and EXAFS has been activated by gaseous BF3 to give an active gas-phase ethylene polymerization catalyst. The polymers thus obtained present a highly branched structure. The activity is attributed to the formation of the putative surface ion pair [≡SiOBF3]-[Ni(7alpha;-diimine)(CH 2SiMe3)]+.

AB - The interaction of [(Α-diimine)Ni(CH2SiMe3)2] (1) (α-diimine = 2,3-dimethyl-l,4-[(2,6)-diisopro-pylphenyl]-N,N -diazadiene) with the silanol =Si - OH groups of Aerosil Si02-(700) leads to the formation of the surface complex [≡SiO - Ni(a-diimine) (CH2SiMe3)] (2) with the concomitant emission of 1 mol equiv of SiMe4 (TMS). The surface complex characterized by IR, chemical and mass balance analyses, solid-state NMR, and EXAFS has been activated by gaseous BF3 to give an active gas-phase ethylene polymerization catalyst. The polymers thus obtained present a highly branched structure. The activity is attributed to the formation of the putative surface ion pair [≡SiOBF3]-[Ni(7alpha;-diimine)(CH 2SiMe3)]+.

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U2 - 10.1021/om800582x

DO - 10.1021/om800582x

M3 - Article

AN - SCOPUS:65349133568

SN - 0276-7333

VL - 28

SP - 2173

EP - 2178

JO - Organometallics

JF - Organometallics

IS - 7

ER -

Preparation of a well-defined silica-supported nickel-diimine alkyl complex - application for the gas-phase polymerization of ethylene

Abstract

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