New Iminophosphonamide Chromium(II) Complexes as Highly Active Polymer-Free Ethylene Oligomerization Catalysts

被引：17

作者：

Albahily, Khalid ^{[1
]}

Ahmed, Zeeshan ^{[1
]}

Gambarotta, Sandro ^{[1
]}

Koc, Ece ^{[2
]}

Duchateau, Robbert ^{[2
]}

Korobkov, Ilia ^{[3
]}

机构：

[1] Univ Ottawa, Dept Chem, Ottawa, ON K1N 6N5, Canada

[2] Eindhoven Univ Technol, Dept Chem Engn & Chem, NL-5600 MB Eindhoven, Netherlands

[3] Fac Sci, Xray Core Facil, Ottawa, ON K1N 6N5, Canada

来源：

ORGANOMETALLICS | 2011年 / 30卷 / 21期

基金：

加拿大自然科学与工程研究理事会;

关键词：

SELECTIVE TRIMERIZATION; TRIAZACYCLOHEXANE COMPLEXES; ETHENE TRIMERIZATION; OXIDATION-STATE; OLEFINS; TETRAMERIZATION; MECHANISM; LIGANDS; ROUTE;

D O I：

10.1021/om2008474

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The reactions of the deprotonated form of cis-{[(mu-N)(t-Bu)](2)PN(H) (o-OMeC6H4)](2)} (a) with either CrCl2(THF)(2) or CrCl3(THF)(3) afforded the corresponding dimeric Cr(II) and monomeric Cr(III) complexes {cis-[(mu-N)(t-Bu)](2)[PN (o-MeOC6H4)](2)Cr}(2) (1a) and cis-[(mu-N)(t-Bu)](2)[PN-2-MeOC6H4](2)CrCl (2a). By replacing the ligand's o-OMeC6H4 groups with less-crowded CH2CH2N(i-Pr)(2) functionalities and reacting the deprotonated form of cis-{[(mu-N)(t-Bu)](2)[PN(H)CH2CH2N(i-Pr)(2))](2)} (b) with CrCl2(THF)(2), the dimetallic, divalent {cis-[(mu-N)(t-Bu)](2)[PNCH2CH2N(i-Pr)(2))](2)Cr}(2) (1b) was obtained in crystalline form. Upon activation with MAO, both la and 1b afforded highly active, polyethylene-free ethylene oligomerization catalysts. Complex 2a is instead catalytically inactive.

引用

页码：6022 / 6027

页数：6

共 61 条

[31]

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[32] Triazacyclohexane complexes of chromium as highly active homogeneous model systems for the Phillips catalyst [J].