Tunable regioselectivity in 1,3-butadiene polymerization by using 2,6-bis(dimethyl-2-oxazolin-2-yl)pyridine incorporated transition metal (Cr, Fe and Co) catalysts

Dirong Gong; Wen Liu; Weijing Pan; Tao Chen; Xiaoyu Jia; Kuo-Wei Huang; Xuequan Zhang

doi:10.1016/j.molcata.2015.05.013

Tunable regioselectivity in 1,3-butadiene polymerization by using 2,6-bis(dimethyl-2-oxazolin-2-yl)pyridine incorporated transition metal (Cr, Fe and Co) catalysts

Dirong Gong, Wen Liu, Weijing Pan, Tao Chen, Xiaoyu Jia, Kuo-Wei Huang, Xuequan Zhang

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

30 Citations (SciVal)

Abstract

Tridentate complexes Cr(III)Cl3L, [L = 2,6-bis(dimethyl-2-oxazolin-2-yl) pyridine], Fe(III)Cl3L, Fe(II)Cl2L and Co(II)Cl2L have been prepared and fully characterized. The solid structures of Cr(III)Cl3L, Fe(III)Cl3L and Co(II)Cl2L have been revealed by single crystal X-ray diffraction, and the Cr(III)Cl3L and Fe(III)Cl3L complexes both exhibit a distorted octahedral geometry, while the Co(II)Cl2L complex has a trigonal bipyramidal conformation. Four complexes have been examined in regioselective polymerization of butadiene in combination with MAO in toluene at room temperature. The trans-1,4, cis-1,4 enchainment of resultant polybutadiene are controlled by the metal center. Activated by MAO, complex Cr(III)Cl3L produces high level of trans-1,4 selectivity (trans-1,4 up to 93.3%) with moderate polymer yield, complexes Fe(III)Cl3L and Fe(II)Cl2L both show equal cis-1,4 and trans-1,4 with minor 1,2 selectivity (

Original language	English (US)
Pages (from-to)	78-84
Number of pages	7
Journal	Journal of Molecular Catalysis A: Chemical
Volume	406
DOIs	https://doi.org/10.1016/j.molcata.2015.05.013
State	Published - May 21 2015

ASJC Scopus subject areas

Catalysis
Physical and Theoretical Chemistry
Process Chemistry and Technology

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10.1016/j.molcata.2015.05.013

https://repository.kaust.edu.sa/bitstream/10754/555759/2/1-s2.0-S1381116915001867-main.pdf

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title = "Tunable regioselectivity in 1,3-butadiene polymerization by using 2,6-bis(dimethyl-2-oxazolin-2-yl)pyridine incorporated transition metal (Cr, Fe and Co) catalysts",

abstract = "Tridentate complexes Cr(III)Cl3L, [L = 2,6-bis(dimethyl-2-oxazolin-2-yl) pyridine], Fe(III)Cl3L, Fe(II)Cl2L and Co(II)Cl2L have been prepared and fully characterized. The solid structures of Cr(III)Cl3L, Fe(III)Cl3L and Co(II)Cl2L have been revealed by single crystal X-ray diffraction, and the Cr(III)Cl3L and Fe(III)Cl3L complexes both exhibit a distorted octahedral geometry, while the Co(II)Cl2L complex has a trigonal bipyramidal conformation. Four complexes have been examined in regioselective polymerization of butadiene in combination with MAO in toluene at room temperature. The trans-1,4, cis-1,4 enchainment of resultant polybutadiene are controlled by the metal center. Activated by MAO, complex Cr(III)Cl3L produces high level of trans-1,4 selectivity (trans-1,4 up to 93.3%) with moderate polymer yield, complexes Fe(III)Cl3L and Fe(II)Cl2L both show equal cis-1,4 and trans-1,4 with minor 1,2 selectivity (",

author = "Dirong Gong and Wen Liu and Weijing Pan and Tao Chen and Xiaoyu Jia and Kuo-Wei Huang and Xuequan Zhang",

note = "KAUST Repository Item: Exported on 2020-10-01",

year = "2015",

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doi = "10.1016/j.molcata.2015.05.013",

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T1 - Tunable regioselectivity in 1,3-butadiene polymerization by using 2,6-bis(dimethyl-2-oxazolin-2-yl)pyridine incorporated transition metal (Cr, Fe and Co) catalysts

AU - Gong, Dirong

AU - Liu, Wen

AU - Pan, Weijing

AU - Chen, Tao

AU - Jia, Xiaoyu

AU - Huang, Kuo-Wei

AU - Zhang, Xuequan

N1 - KAUST Repository Item: Exported on 2020-10-01

PY - 2015/5/21

Y1 - 2015/5/21

N2 - Tridentate complexes Cr(III)Cl3L, [L = 2,6-bis(dimethyl-2-oxazolin-2-yl) pyridine], Fe(III)Cl3L, Fe(II)Cl2L and Co(II)Cl2L have been prepared and fully characterized. The solid structures of Cr(III)Cl3L, Fe(III)Cl3L and Co(II)Cl2L have been revealed by single crystal X-ray diffraction, and the Cr(III)Cl3L and Fe(III)Cl3L complexes both exhibit a distorted octahedral geometry, while the Co(II)Cl2L complex has a trigonal bipyramidal conformation. Four complexes have been examined in regioselective polymerization of butadiene in combination with MAO in toluene at room temperature. The trans-1,4, cis-1,4 enchainment of resultant polybutadiene are controlled by the metal center. Activated by MAO, complex Cr(III)Cl3L produces high level of trans-1,4 selectivity (trans-1,4 up to 93.3%) with moderate polymer yield, complexes Fe(III)Cl3L and Fe(II)Cl2L both show equal cis-1,4 and trans-1,4 with minor 1,2 selectivity (

AB - Tridentate complexes Cr(III)Cl3L, [L = 2,6-bis(dimethyl-2-oxazolin-2-yl) pyridine], Fe(III)Cl3L, Fe(II)Cl2L and Co(II)Cl2L have been prepared and fully characterized. The solid structures of Cr(III)Cl3L, Fe(III)Cl3L and Co(II)Cl2L have been revealed by single crystal X-ray diffraction, and the Cr(III)Cl3L and Fe(III)Cl3L complexes both exhibit a distorted octahedral geometry, while the Co(II)Cl2L complex has a trigonal bipyramidal conformation. Four complexes have been examined in regioselective polymerization of butadiene in combination with MAO in toluene at room temperature. The trans-1,4, cis-1,4 enchainment of resultant polybutadiene are controlled by the metal center. Activated by MAO, complex Cr(III)Cl3L produces high level of trans-1,4 selectivity (trans-1,4 up to 93.3%) with moderate polymer yield, complexes Fe(III)Cl3L and Fe(II)Cl2L both show equal cis-1,4 and trans-1,4 with minor 1,2 selectivity (

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DO - 10.1016/j.molcata.2015.05.013

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SN - 1381-1169

VL - 406

SP - 78

EP - 84

JO - Journal of Molecular Catalysis A: Chemical

JF - Journal of Molecular Catalysis A: Chemical

ER -

Tunable regioselectivity in 1,3-butadiene polymerization by using 2,6-bis(dimethyl-2-oxazolin-2-yl)pyridine incorporated transition metal (Cr, Fe and Co) catalysts

Abstract

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CCDC 1005506: Experimental Crystal Structure Determination : (2,6-bis(4,4-dimethyl-4,5-dihydro-1,3-oxazol-2-yl)pyridine)-trichloro-iron(iii)

CCDC 1005507: Experimental Crystal Structure Determination : (2,6-bis(4,4-dimethyl-4,5-dihydro-1,3-oxazol-2-yl)pyridine)-dichloro-cobalt(ii)

CCDC 1005508: Experimental Crystal Structure Determination : (2,6-bis(4,4-dimethyl-4,5-dihydro-1,3-oxazol-2-yl)pyridine)-trichloro-chromium(iii)

Cite this

Tunable regioselectivity in 1,3-butadiene polymerization by using 2,6-bis(dimethyl-2-oxazolin-2-yl)pyridine incorporated transition metal (Cr, Fe and Co) catalysts

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Datasets

CCDC 1005506: Experimental Crystal Structure Determination : (2,6-bis(4,4-dimethyl-4,5-dihydro-1,3-oxazol-2-yl)pyridine)-trichloro-iron(iii)

CCDC 1005507: Experimental Crystal Structure Determination : (2,6-bis(4,4-dimethyl-4,5-dihydro-1,3-oxazol-2-yl)pyridine)-dichloro-cobalt(ii)

CCDC 1005508: Experimental Crystal Structure Determination : (2,6-bis(4,4-dimethyl-4,5-dihydro-1,3-oxazol-2-yl)pyridine)-trichloro-chromium(iii)

Cite this