Preparation and Characterization of a Switchable Single-Component Chromium Trimerization Catalyst

Khalid Albahily; Danya Al-Baldawi; Sandro Gambarotta; Robbert Duchateau; Ece Koc; Tara J. Burchell

doi:10.1021/om800563w

Preparation and Characterization of a Switchable Single-Component Chromium Trimerization Catalyst

Khalid Albahily, Danya Al-Baldawi, Sandro Gambarotta^*, Robbert Duchateau^*, Ece Koc, Tara J. Burchell

^*Corresponding author for this work

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

38 Citations (Scopus)

Abstract

Reaction of [(Ar)NPN(t-Bu)](2)Cr (2) with Me3Al afforded {[(Ar)NP(Me)N(t-Bu)]AlMe2}Cr{[(Ar)NP(Me)-(AlMe3)N(t-Bu)]AlMe(mu-Me)} (3), in which the ligand's P atom has been alkylated and one AlR2 residue retained by the chelating framework. One of the two ligands also retained an additional Me3Al unit via coordination to the alkylated P atom. Complex 3 provides the first case of a selective ethylene trimerization catalyst with high activity and excellent selectivity, producing 1-hexene upon exposure to ethylene at 80 degrees C. Furthermore, upon treatment with MAO, complex 3 acts as a nonselective catalyst, producing a statistical mixture of oligomers with the highest ever observed activity. In addition, upon treatment with [(i-Bu)(2)Al](2)O, the complex acts as a highly active polymerization catalyst.

Original language	English
Pages (from-to)	5708-5711
Number of pages	4
Journal	Organometallics
Volume	27
Issue number	21
DOIs	https://doi.org/10.1021/om800563w
Publication status	Published - 10-Nov-2008
Externally published	Yes

Keywords

BRIDGED DIPHOSPHINE LIGAND
ZIEGLER-NATTA CATALYSIS
METAL OXIDATION-STATE
ETHYLENE TRIMERIZATION
POLYMERIZATION CATALYSTS
THERMAL-DECOMPOSITION
ETHENE POLYMERIZATION
ORTHO-METHOXYARYL
ALPHA-OLEFINS
COMPLEXES

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Preparation and Characterization of a Switchable Single-ComponentChromium Trimerization Catalyst
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@article{d1ab73caeef9484781e664146b9fb757,

title = "Preparation and Characterization of a Switchable Single-Component Chromium Trimerization Catalyst",

abstract = "Reaction of [(Ar)NPN(t-Bu)](2)Cr (2) with Me3Al afforded {[(Ar)NP(Me)N(t-Bu)]AlMe2}Cr{[(Ar)NP(Me)-(AlMe3)N(t-Bu)]AlMe(mu-Me)} (3), in which the ligand's P atom has been alkylated and one AlR2 residue retained by the chelating framework. One of the two ligands also retained an additional Me3Al unit via coordination to the alkylated P atom. Complex 3 provides the first case of a selective ethylene trimerization catalyst with high activity and excellent selectivity, producing 1-hexene upon exposure to ethylene at 80 degrees C. Furthermore, upon treatment with MAO, complex 3 acts as a nonselective catalyst, producing a statistical mixture of oligomers with the highest ever observed activity. In addition, upon treatment with [(i-Bu)(2)Al](2)O, the complex acts as a highly active polymerization catalyst.",

keywords = "BRIDGED DIPHOSPHINE LIGAND, ZIEGLER-NATTA CATALYSIS, METAL OXIDATION-STATE, ETHYLENE TRIMERIZATION, POLYMERIZATION CATALYSTS, THERMAL-DECOMPOSITION, ETHENE POLYMERIZATION, ORTHO-METHOXYARYL, ALPHA-OLEFINS, COMPLEXES",

author = "Khalid Albahily and Danya Al-Baldawi and Sandro Gambarotta and Robbert Duchateau and Ece Koc and Burchell, {Tara J.}",

year = "2008",

month = nov,

day = "10",

doi = "10.1021/om800563w",

language = "English",

volume = "27",

pages = "5708--5711",

journal = "Organometallics",

issn = "0276-7333",

publisher = "AMER CHEMICAL SOC INC",

number = "21",

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TY - JOUR

T1 - Preparation and Characterization of a Switchable Single-Component Chromium Trimerization Catalyst

AU - Albahily, Khalid

AU - Al-Baldawi, Danya

AU - Gambarotta, Sandro

AU - Duchateau, Robbert

AU - Koc, Ece

AU - Burchell, Tara J.

PY - 2008/11/10

Y1 - 2008/11/10

N2 - Reaction of [(Ar)NPN(t-Bu)](2)Cr (2) with Me3Al afforded {[(Ar)NP(Me)N(t-Bu)]AlMe2}Cr{[(Ar)NP(Me)-(AlMe3)N(t-Bu)]AlMe(mu-Me)} (3), in which the ligand's P atom has been alkylated and one AlR2 residue retained by the chelating framework. One of the two ligands also retained an additional Me3Al unit via coordination to the alkylated P atom. Complex 3 provides the first case of a selective ethylene trimerization catalyst with high activity and excellent selectivity, producing 1-hexene upon exposure to ethylene at 80 degrees C. Furthermore, upon treatment with MAO, complex 3 acts as a nonselective catalyst, producing a statistical mixture of oligomers with the highest ever observed activity. In addition, upon treatment with [(i-Bu)(2)Al](2)O, the complex acts as a highly active polymerization catalyst.

AB - Reaction of [(Ar)NPN(t-Bu)](2)Cr (2) with Me3Al afforded {[(Ar)NP(Me)N(t-Bu)]AlMe2}Cr{[(Ar)NP(Me)-(AlMe3)N(t-Bu)]AlMe(mu-Me)} (3), in which the ligand's P atom has been alkylated and one AlR2 residue retained by the chelating framework. One of the two ligands also retained an additional Me3Al unit via coordination to the alkylated P atom. Complex 3 provides the first case of a selective ethylene trimerization catalyst with high activity and excellent selectivity, producing 1-hexene upon exposure to ethylene at 80 degrees C. Furthermore, upon treatment with MAO, complex 3 acts as a nonselective catalyst, producing a statistical mixture of oligomers with the highest ever observed activity. In addition, upon treatment with [(i-Bu)(2)Al](2)O, the complex acts as a highly active polymerization catalyst.

KW - BRIDGED DIPHOSPHINE LIGAND

KW - ZIEGLER-NATTA CATALYSIS

KW - METAL OXIDATION-STATE

KW - ETHYLENE TRIMERIZATION

KW - POLYMERIZATION CATALYSTS

KW - THERMAL-DECOMPOSITION

KW - ETHENE POLYMERIZATION

KW - ORTHO-METHOXYARYL

KW - ALPHA-OLEFINS

KW - COMPLEXES

U2 - 10.1021/om800563w

DO - 10.1021/om800563w

M3 - Article

SN - 0276-7333

VL - 27

SP - 5708

EP - 5711

JO - Organometallics

JF - Organometallics

IS - 21

ER -

Preparation and Characterization of a Switchable Single-Component Chromium Trimerization Catalyst

Abstract

Keywords

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