Synthesis of mono- and bis- benzimidazolin-2-iminato titanium complexes and their catalytic performances in ethylene homo- and co- polymerizations

Beibei Wang; Xiaohua Wang; Rui Zhuang; Chunyu Zhang; Heng Liu; Tao Tang; Moris S. Eisen; Xuequan Zhang

doi:10.1016/j.mcat.2021.111974

Synthesis of mono- and bis- benzimidazolin-2-iminato titanium complexes and their catalytic performances in ethylene homo- and co- polymerizations

Beibei Wang^*, Xiaohua Wang, Rui Zhuang, Chunyu Zhang, Heng Liu, Tao Tang, Moris S. Eisen, Xuequan Zhang

^*Corresponding author for this work

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

2 Scopus citations

Abstract

A series of mono- and bis- benzimidazolin-2-iminato titanium complexes (Ti1–Ti6) were synthesized herein. All the complexes were isolated in high yields and confirmed by ¹H and ¹³C NMR spectra. Molecular structures of complexes Ti1, Ti3, and Ti4 were further determined by single-crystal X-ray diffraction, which gave comprehensive bond properties as well as structural differences with the previously reported imidazolin-2-iminato titanium analogs. Being activated by methylaluminoxane (MAO), all the complexes showed moderate activities for ethylene homopolymerization and copolymerization with α-olefins. In all the cases, the resultant polymers had narrow molecular weight distributions. The catalysts still possessed acceptable polymerization activities even at a temperature of 90 °C, implying the uniqueness of the benzimidazolin-2-iminato ligand.

Original language	English
Article number	111974
Journal	Molecular Catalysis
Volume	516
DOIs	https://doi.org/10.1016/j.mcat.2021.111974
State	Published - Nov 2021
Externally published	Yes

Keywords

Benzimidazolin-2-iminato
Copolymerization
Moderate activities
Substituent effects
Titanium

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10.1016/j.mcat.2021.111974

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@article{16e27e872130403584b81be71b24d235,

title = "Synthesis of mono- and bis- benzimidazolin-2-iminato titanium complexes and their catalytic performances in ethylene homo- and co- polymerizations",

abstract = "A series of mono- and bis- benzimidazolin-2-iminato titanium complexes (Ti1–Ti6) were synthesized herein. All the complexes were isolated in high yields and confirmed by 1H and 13C NMR spectra. Molecular structures of complexes Ti1, Ti3, and Ti4 were further determined by single-crystal X-ray diffraction, which gave comprehensive bond properties as well as structural differences with the previously reported imidazolin-2-iminato titanium analogs. Being activated by methylaluminoxane (MAO), all the complexes showed moderate activities for ethylene homopolymerization and copolymerization with α-olefins. In all the cases, the resultant polymers had narrow molecular weight distributions. The catalysts still possessed acceptable polymerization activities even at a temperature of 90 °C, implying the uniqueness of the benzimidazolin-2-iminato ligand.",

keywords = "Benzimidazolin-2-iminato, Copolymerization, Moderate activities, Substituent effects, Titanium",

author = "Beibei Wang and Xiaohua Wang and Rui Zhuang and Chunyu Zhang and Heng Liu and Tao Tang and Eisen, {Moris S.} and Xuequan Zhang",

note = "Publisher Copyright: {\textcopyright} 2021",

year = "2021",

month = nov,

doi = "10.1016/j.mcat.2021.111974",

language = "英语",

volume = "516",

journal = "Molecular Catalysis",

issn = "2468-8231",

publisher = "Elsevier BV",

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T1 - Synthesis of mono- and bis- benzimidazolin-2-iminato titanium complexes and their catalytic performances in ethylene homo- and co- polymerizations

AU - Wang, Beibei

AU - Wang, Xiaohua

AU - Zhuang, Rui

AU - Zhang, Chunyu

AU - Liu, Heng

AU - Tang, Tao

AU - Eisen, Moris S.

AU - Zhang, Xuequan

PY - 2021/11

Y1 - 2021/11

N2 - A series of mono- and bis- benzimidazolin-2-iminato titanium complexes (Ti1–Ti6) were synthesized herein. All the complexes were isolated in high yields and confirmed by 1H and 13C NMR spectra. Molecular structures of complexes Ti1, Ti3, and Ti4 were further determined by single-crystal X-ray diffraction, which gave comprehensive bond properties as well as structural differences with the previously reported imidazolin-2-iminato titanium analogs. Being activated by methylaluminoxane (MAO), all the complexes showed moderate activities for ethylene homopolymerization and copolymerization with α-olefins. In all the cases, the resultant polymers had narrow molecular weight distributions. The catalysts still possessed acceptable polymerization activities even at a temperature of 90 °C, implying the uniqueness of the benzimidazolin-2-iminato ligand.

AB - A series of mono- and bis- benzimidazolin-2-iminato titanium complexes (Ti1–Ti6) were synthesized herein. All the complexes were isolated in high yields and confirmed by 1H and 13C NMR spectra. Molecular structures of complexes Ti1, Ti3, and Ti4 were further determined by single-crystal X-ray diffraction, which gave comprehensive bond properties as well as structural differences with the previously reported imidazolin-2-iminato titanium analogs. Being activated by methylaluminoxane (MAO), all the complexes showed moderate activities for ethylene homopolymerization and copolymerization with α-olefins. In all the cases, the resultant polymers had narrow molecular weight distributions. The catalysts still possessed acceptable polymerization activities even at a temperature of 90 °C, implying the uniqueness of the benzimidazolin-2-iminato ligand.

KW - Benzimidazolin-2-iminato

KW - Copolymerization

KW - Moderate activities

KW - Substituent effects

KW - Titanium

UR - http://www.scopus.com/inward/record.url?scp=85118104934&partnerID=8YFLogxK

U2 - 10.1016/j.mcat.2021.111974

DO - 10.1016/j.mcat.2021.111974

M3 - 文章

AN - SCOPUS:85118104934

SN - 2468-8231

VL - 516

JO - Molecular Catalysis

JF - Molecular Catalysis

M1 - 111974

ER -

Synthesis of mono- and bis- benzimidazolin-2-iminato titanium complexes and their catalytic performances in ethylene homo- and co- polymerizations

Abstract

Keywords

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