Bis-ligated Ti and Zr complexes of chelating N-heterocyclic carbenes

Amer El-Batta; Andrew W. Waltman; Robert H. Grubbs

doi:10.1016/j.jorganchem.2011.03.027

Bis-ligated Ti and Zr complexes of chelating N-heterocyclic carbenes

Amer El-Batta, Andrew W. Waltman, Robert H. Grubbs

King Fahd University of Petroleum & Minerals

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

41 Scopus citations

Abstract

In this communication we report the synthesis of novel titanium and zirconium complexes ligated by bidentate "salicylaldimine-like" N-heterocyclic carbenes (NHC). Double addition of the NHC chelate to either TiCl₄(thf)₂ or ZrCl₄ forms bis-ligated organometallic fragments with a distorted octahedral geometry. These complexes are rare examples of group IV transition-metal NHC adducts. Preliminary catalytic tests demonstrate that in the presence of methylaluminoxane (MAO) these complexes are useful initiators for the polymerization of ethylene and the copolymerization of ethylene with norbornene and 1-octene.

Original language	English
Pages (from-to)	2477-2481
Number of pages	5
Journal	Journal of Organometallic Chemistry
Volume	696
Issue number	13
DOIs	https://doi.org/10.1016/j.jorganchem.2011.03.027
State	Published - 1 Jul 2011

Keywords

Complex
N-heterocyclic carbene
Organometallic
Polymerization
Titanium
Zirconium

ASJC Scopus subject areas

Biochemistry
Physical and Theoretical Chemistry
Organic Chemistry
Inorganic Chemistry
Materials Chemistry

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10.1016/j.jorganchem.2011.03.027

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title = "Bis-ligated Ti and Zr complexes of chelating N-heterocyclic carbenes",

abstract = "In this communication we report the synthesis of novel titanium and zirconium complexes ligated by bidentate {"}salicylaldimine-like{"} N-heterocyclic carbenes (NHC). Double addition of the NHC chelate to either TiCl4(thf)2 or ZrCl4 forms bis-ligated organometallic fragments with a distorted octahedral geometry. These complexes are rare examples of group IV transition-metal NHC adducts. Preliminary catalytic tests demonstrate that in the presence of methylaluminoxane (MAO) these complexes are useful initiators for the polymerization of ethylene and the copolymerization of ethylene with norbornene and 1-octene.",

keywords = "Complex, N-heterocyclic carbene, Organometallic, Polymerization, Titanium, Zirconium",

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year = "2011",

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language = "English",

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journal = "Journal of Organometallic Chemistry",

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T1 - Bis-ligated Ti and Zr complexes of chelating N-heterocyclic carbenes

AU - El-Batta, Amer

AU - Waltman, Andrew W.

AU - Grubbs, Robert H.

PY - 2011/7/1

Y1 - 2011/7/1

N2 - In this communication we report the synthesis of novel titanium and zirconium complexes ligated by bidentate "salicylaldimine-like" N-heterocyclic carbenes (NHC). Double addition of the NHC chelate to either TiCl4(thf)2 or ZrCl4 forms bis-ligated organometallic fragments with a distorted octahedral geometry. These complexes are rare examples of group IV transition-metal NHC adducts. Preliminary catalytic tests demonstrate that in the presence of methylaluminoxane (MAO) these complexes are useful initiators for the polymerization of ethylene and the copolymerization of ethylene with norbornene and 1-octene.

AB - In this communication we report the synthesis of novel titanium and zirconium complexes ligated by bidentate "salicylaldimine-like" N-heterocyclic carbenes (NHC). Double addition of the NHC chelate to either TiCl4(thf)2 or ZrCl4 forms bis-ligated organometallic fragments with a distorted octahedral geometry. These complexes are rare examples of group IV transition-metal NHC adducts. Preliminary catalytic tests demonstrate that in the presence of methylaluminoxane (MAO) these complexes are useful initiators for the polymerization of ethylene and the copolymerization of ethylene with norbornene and 1-octene.

KW - Complex

KW - N-heterocyclic carbene

KW - Organometallic

KW - Polymerization

KW - Titanium

KW - Zirconium

UR - https://www.scopus.com/pages/publications/79957762520

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DO - 10.1016/j.jorganchem.2011.03.027

M3 - Article

AN - SCOPUS:79957762520

SN - 0022-328X

VL - 696

SP - 2477

EP - 2481

JO - Journal of Organometallic Chemistry

JF - Journal of Organometallic Chemistry

IS - 13

ER -

Bis-ligated Ti and Zr complexes of chelating N-heterocyclic carbenes

Abstract

Keywords

ASJC Scopus subject areas

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