Synthesis, characterization and reactivity of amido titanium and zirconium complexes

Helmut Mack; Moris S. Eisen

doi:10.1016/S0022-328X(96)06515-1

Synthesis, characterization and reactivity of amido titanium and zirconium complexes

Helmut Mack, Moris S. Eisen^*

^*Corresponding author for this work

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

54 Scopus citations

Abstract

The polymerization of ethylene and propylene was studied by using a series of mono-and spirocyclic coordinatively unsaturated early transition metal amides as pre-catalysts. Amido complexes were prepared either by metathesis reaction of Cp₂ZrCl₂ and the dilithium salt of the bisamido ligand (Me₃SiN-(CH₂)₂-NSiMe₃)^2-, by transamination reaction of Zr(NMe₂)₄ with two equivalents of the diamine ligand (Me₃SiNH-(CH₂)₂-NHSiMe₃), and by metathesis reaction of ZrCl₄ • 2THF or TiCl₄ with equimolar amounts of the dilithium salt (Me₃SiN-(CH₂)₂-NSiMe₃)^2-. The complexes obtained were characterized by standard spectroscopic techniques. 'Cationic' polymerization catalysts were generated from the early transition-metal amides with methylalumoxane. Polymerization activity is dependent on catalyst and co-catalyst concentrations.

Original language	English
Pages (from-to)	81-87
Number of pages	7
Journal	Journal of Organometallic Chemistry
Volume	525
Issue number	1-2
DOIs	https://doi.org/10.1016/S0022-328X(96)06515-1
State	Published - 15 Nov 1996
Externally published	Yes

Keywords

Group 4
Metallocenes
Polymerization
Titanium
Zirconium
α-olefins

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10.1016/S0022-328X(96)06515-1

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title = "Synthesis, characterization and reactivity of amido titanium and zirconium complexes",

abstract = "The polymerization of ethylene and propylene was studied by using a series of mono-and spirocyclic coordinatively unsaturated early transition metal amides as pre-catalysts. Amido complexes were prepared either by metathesis reaction of Cp2ZrCl2 and the dilithium salt of the bisamido ligand (Me3SiN-(CH2)2-NSiMe3)2-, by transamination reaction of Zr(NMe2)4 with two equivalents of the diamine ligand (Me3SiNH-(CH2)2-NHSiMe3), and by metathesis reaction of ZrCl4 • 2THF or TiCl4 with equimolar amounts of the dilithium salt (Me3SiN-(CH2)2-NSiMe3)2-. The complexes obtained were characterized by standard spectroscopic techniques. 'Cationic' polymerization catalysts were generated from the early transition-metal amides with methylalumoxane. Polymerization activity is dependent on catalyst and co-catalyst concentrations.",

keywords = "Group 4, Metallocenes, Polymerization, Titanium, Zirconium, α-olefins",

author = "Helmut Mack and Eisen, {Moris S.}",

note = "Funding Information: This research was supported by The Israel Science Foundation administered by The Israel Academy of Sciences and Humanities under Contract 76/94~1, and the Ministry of Science and the Arts, Ministry of Nicdersachssen, Germany, It.M. thanks the Max-Planck-Gesellschaft for a MINERVA i~stdoctot~d I~1° Iowship.",

year = "1996",

month = nov,

day = "15",

doi = "10.1016/S0022-328X(96)06515-1",

language = "英语",

volume = "525",

pages = "81--87",

journal = "Journal of Organometallic Chemistry",

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number = "1-2",

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TY - JOUR

T1 - Synthesis, characterization and reactivity of amido titanium and zirconium complexes

AU - Mack, Helmut

AU - Eisen, Moris S.

N1 - Funding Information: This research was supported by The Israel Science Foundation administered by The Israel Academy of Sciences and Humanities under Contract 76/94~1, and the Ministry of Science and the Arts, Ministry of Nicdersachssen, Germany, It.M. thanks the Max-Planck-Gesellschaft for a MINERVA i~stdoctot~d I~1° Iowship.

PY - 1996/11/15

Y1 - 1996/11/15

N2 - The polymerization of ethylene and propylene was studied by using a series of mono-and spirocyclic coordinatively unsaturated early transition metal amides as pre-catalysts. Amido complexes were prepared either by metathesis reaction of Cp2ZrCl2 and the dilithium salt of the bisamido ligand (Me3SiN-(CH2)2-NSiMe3)2-, by transamination reaction of Zr(NMe2)4 with two equivalents of the diamine ligand (Me3SiNH-(CH2)2-NHSiMe3), and by metathesis reaction of ZrCl4 • 2THF or TiCl4 with equimolar amounts of the dilithium salt (Me3SiN-(CH2)2-NSiMe3)2-. The complexes obtained were characterized by standard spectroscopic techniques. 'Cationic' polymerization catalysts were generated from the early transition-metal amides with methylalumoxane. Polymerization activity is dependent on catalyst and co-catalyst concentrations.

AB - The polymerization of ethylene and propylene was studied by using a series of mono-and spirocyclic coordinatively unsaturated early transition metal amides as pre-catalysts. Amido complexes were prepared either by metathesis reaction of Cp2ZrCl2 and the dilithium salt of the bisamido ligand (Me3SiN-(CH2)2-NSiMe3)2-, by transamination reaction of Zr(NMe2)4 with two equivalents of the diamine ligand (Me3SiNH-(CH2)2-NHSiMe3), and by metathesis reaction of ZrCl4 • 2THF or TiCl4 with equimolar amounts of the dilithium salt (Me3SiN-(CH2)2-NSiMe3)2-. The complexes obtained were characterized by standard spectroscopic techniques. 'Cationic' polymerization catalysts were generated from the early transition-metal amides with methylalumoxane. Polymerization activity is dependent on catalyst and co-catalyst concentrations.

KW - Group 4

KW - Metallocenes

KW - Polymerization

KW - Titanium

KW - Zirconium

KW - α-olefins

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U2 - 10.1016/S0022-328X(96)06515-1

DO - 10.1016/S0022-328X(96)06515-1

M3 - 文章

AN - SCOPUS:0030588845

SN - 0022-328X

VL - 525

SP - 81

EP - 87

JO - Journal of Organometallic Chemistry

JF - Journal of Organometallic Chemistry

IS - 1-2

ER -

Synthesis, characterization and reactivity of amido titanium and zirconium complexes

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