Synthesis, characterization, and ethylene polymerization behavior of [(RR′-admpzp)2Ti(OPri)2] complexes (RR′-admpzp = 1-dialkylamino-3-(3,5-dimethyl-pyrazol-1-yl)-propan-2-olate)

Alexey Zazybin; Sean Parkin; Folami T. Ladipo

doi:10.1016/j.jorganchem.2007.08.040

Synthesis, characterization, and ethylene polymerization behavior of [(RR′-admpzp)₂Ti(OPrⁱ)₂] complexes (RR′-admpzp = 1-dialkylamino-3-(3,5-dimethyl-pyrazol-1-yl)-propan-2-olate)

Alexey Zazybin, Sean Parkin, Folami T. Ladipo

Chemistry

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

2 Scopus citations

Abstract

[(RR′-admpzp)₂Ti(OPrⁱ)₂] complexes (2a-c), synthesized from reaction of Ti(OPrⁱ)₃Cl (0.5 equiv) with 1-dialkylamino-3-(3,5-dimethyl-pyrazol-1-yl)-propan-2-ol compounds in the presence of triethylamine (0.5 equiv), are pseudo-octahedral with each RR′-admpzp ligand κ²-O,N(pyrazolyl) coordinated to the titanium center. In solution, 2a-c adopt isomeric structures that are in dynamic equilibrium. At 23 °C, 2a-c/1000 MAO catalyst systems furnished high molecular weight polymers with narrow molecular weight distributions (M_w/M_n = 2.7-2.8). At 100 °C, 2a-c/MAO catalyst systems exhibited increased polymerization activity and 2c/1000 MAO system furnished high molecular weight polyethylene with a molecular weight distribution (M_w/M_n = 2.1) that is close to that found for single-site catalysts.

Original language	English
Pages (from-to)	5375-5382
Number of pages	8
Journal	Journal of Organometallic Chemistry
Volume	692
Issue number	24
DOIs	https://doi.org/10.1016/j.jorganchem.2007.08.040
State	Published - Nov 15 2007

Bibliographical note

Funding Information:
Thanks are expressed to the US National Science Foundation (Grant No. CHE-0416098) for financial support of this work. NMR instruments utilized in this research were funded in part by the CRIF program of the US National Science Foundation (Grant No. CHE-9974810). This work made use of the materials characterization facility of the Cornell Center for Materials Research (CCMR) with support from the National Science Foundation Materials Research Science and Engineering Centers (MRSEC) Program (DMR 0520404).

Keywords

1-Dialkylamino-3-(3,5-dimethyl-pyrazol-1-yl)-propan-2-olate ligands
Olefin polymerization
Titanium(IV) catalysts

ASJC Scopus subject areas

Biochemistry
Physical and Theoretical Chemistry
Organic Chemistry
Inorganic Chemistry
Materials Chemistry

Access to Document

10.1016/j.jorganchem.2007.08.040

Cite this

@article{8b36784293074674baf44e9deae6c279,

title = "Synthesis, characterization, and ethylene polymerization behavior of [(RR′-admpzp)2Ti(OPri)2] complexes (RR′-admpzp = 1-dialkylamino-3-(3,5-dimethyl-pyrazol-1-yl)-propan-2-olate)",

abstract = "[(RR′-admpzp)2Ti(OPri)2] complexes (2a-c), synthesized from reaction of Ti(OPri)3Cl (0.5 equiv) with 1-dialkylamino-3-(3,5-dimethyl-pyrazol-1-yl)-propan-2-ol compounds in the presence of triethylamine (0.5 equiv), are pseudo-octahedral with each RR′-admpzp ligand κ2-O,N(pyrazolyl) coordinated to the titanium center. In solution, 2a-c adopt isomeric structures that are in dynamic equilibrium. At 23 °C, 2a-c/1000 MAO catalyst systems furnished high molecular weight polymers with narrow molecular weight distributions (Mw/Mn = 2.7-2.8). At 100 °C, 2a-c/MAO catalyst systems exhibited increased polymerization activity and 2c/1000 MAO system furnished high molecular weight polyethylene with a molecular weight distribution (Mw/Mn = 2.1) that is close to that found for single-site catalysts.",

keywords = "1-Dialkylamino-3-(3,5-dimethyl-pyrazol-1-yl)-propan-2-olate ligands, Olefin polymerization, Titanium(IV) catalysts",

author = "Alexey Zazybin and Sean Parkin and Ladipo, {Folami T.}",

note = "Funding Information: Thanks are expressed to the US National Science Foundation (Grant No. CHE-0416098) for financial support of this work. NMR instruments utilized in this research were funded in part by the CRIF program of the US National Science Foundation (Grant No. CHE-9974810). This work made use of the materials characterization facility of the Cornell Center for Materials Research (CCMR) with support from the National Science Foundation Materials Research Science and Engineering Centers (MRSEC) Program (DMR 0520404). ",

year = "2007",

month = nov,

day = "15",

doi = "10.1016/j.jorganchem.2007.08.040",

language = "English",

volume = "692",

pages = "5375--5382",

number = "24",

}

Synthesis, characterization, and ethylene polymerization behavior of [(RR′-admpzp)₂Ti(OPrⁱ)₂] complexes (RR′-admpzp = 1-dialkylamino-3-(3,5-dimethyl-pyrazol-1-yl)-propan-2-olate). / Zazybin, Alexey; Parkin, Sean ; Ladipo, Folami T.
In: Journal of Organometallic Chemistry, Vol. 692, No. 24, 15.11.2007, p. 5375-5382.

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

TY - JOUR

T1 - Synthesis, characterization, and ethylene polymerization behavior of [(RR′-admpzp)2Ti(OPri)2] complexes (RR′-admpzp = 1-dialkylamino-3-(3,5-dimethyl-pyrazol-1-yl)-propan-2-olate)

AU - Zazybin, Alexey

AU - Parkin, Sean

AU - Ladipo, Folami T.

N1 - Funding Information: Thanks are expressed to the US National Science Foundation (Grant No. CHE-0416098) for financial support of this work. NMR instruments utilized in this research were funded in part by the CRIF program of the US National Science Foundation (Grant No. CHE-9974810). This work made use of the materials characterization facility of the Cornell Center for Materials Research (CCMR) with support from the National Science Foundation Materials Research Science and Engineering Centers (MRSEC) Program (DMR 0520404).

PY - 2007/11/15

Y1 - 2007/11/15

N2 - [(RR′-admpzp)2Ti(OPri)2] complexes (2a-c), synthesized from reaction of Ti(OPri)3Cl (0.5 equiv) with 1-dialkylamino-3-(3,5-dimethyl-pyrazol-1-yl)-propan-2-ol compounds in the presence of triethylamine (0.5 equiv), are pseudo-octahedral with each RR′-admpzp ligand κ2-O,N(pyrazolyl) coordinated to the titanium center. In solution, 2a-c adopt isomeric structures that are in dynamic equilibrium. At 23 °C, 2a-c/1000 MAO catalyst systems furnished high molecular weight polymers with narrow molecular weight distributions (Mw/Mn = 2.7-2.8). At 100 °C, 2a-c/MAO catalyst systems exhibited increased polymerization activity and 2c/1000 MAO system furnished high molecular weight polyethylene with a molecular weight distribution (Mw/Mn = 2.1) that is close to that found for single-site catalysts.

AB - [(RR′-admpzp)2Ti(OPri)2] complexes (2a-c), synthesized from reaction of Ti(OPri)3Cl (0.5 equiv) with 1-dialkylamino-3-(3,5-dimethyl-pyrazol-1-yl)-propan-2-ol compounds in the presence of triethylamine (0.5 equiv), are pseudo-octahedral with each RR′-admpzp ligand κ2-O,N(pyrazolyl) coordinated to the titanium center. In solution, 2a-c adopt isomeric structures that are in dynamic equilibrium. At 23 °C, 2a-c/1000 MAO catalyst systems furnished high molecular weight polymers with narrow molecular weight distributions (Mw/Mn = 2.7-2.8). At 100 °C, 2a-c/MAO catalyst systems exhibited increased polymerization activity and 2c/1000 MAO system furnished high molecular weight polyethylene with a molecular weight distribution (Mw/Mn = 2.1) that is close to that found for single-site catalysts.

KW - 1-Dialkylamino-3-(3,5-dimethyl-pyrazol-1-yl)-propan-2-olate ligands

KW - Olefin polymerization

KW - Titanium(IV) catalysts

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U2 - 10.1016/j.jorganchem.2007.08.040

DO - 10.1016/j.jorganchem.2007.08.040

M3 - Article

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VL - 692

SP - 5375

EP - 5382

JO - Journal of Organometallic Chemistry

JF - Journal of Organometallic Chemistry

IS - 24

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