Polymerization of 1,3-butadiene catalyzed by pincer cobalt(II) complexes derived from 2-(1-arylimino)-6-(pyrazol-1-yl)pyridine ligands

Handle URI:
http://hdl.handle.net/10754/562883
Title:
Polymerization of 1,3-butadiene catalyzed by pincer cobalt(II) complexes derived from 2-(1-arylimino)-6-(pyrazol-1-yl)pyridine ligands
Authors:
Gong, Dirong; Jia, Weiguo; Chen, Tao; Huang, Kuo-Wei ( 0000-0003-1900-2658 )
Abstract:
A new class of air stable and structurally well-defined cobalt complexes with unsymmetrical pincer type ligands ([2-(ArNCMe)-6-(Py)C5H 3N]CoCl2) (Ar = C6H5, Py = pyrazol-1-yl, 5a; Ar = 2,4,6-Me3C6H2, Py = pyrazol-1-yl, 5b; Ar = 2,6-iPr2C6H3, Py = pyrazol-1-yl, 5c; Ar = C6H5, Py = 3,5-Me 2pyrazol-1-yl, 5d; Ar = 2,4,6-Me3C6H 2, Py = 3,5-Me2pyrazol-1-yl, 5e; Ar = 2,6- iPr2C6H3, Py = 3,5-Me 2pyrazol-1-yl, 5f; Ar = 2,6-iPr2C 6H3, Py = 3,5-iPr2pyrazol-1-yl, 5g and [2-(OCMe)-6-(3,5-diphenylpyrazol-1-yl)C5H3N]CoCl 2 5h) were prepared and the molecular structures of 5a, 5c and 5f were determined by single crystal X-ray crystallography. Upon activation by methylaluminoxane (MAO) in toluene at room temperature, all complexes initiate polymerization of 1,3-butadiene (polymer yields: 65-99%), affording polybutadiene with excellent cis-1,4 regularity (97.5-98.7%). The polymer yields and properties in terms of molecular weight and distribution are well controlled by the substituents on iminoaryl rings and pyrazole rings. Selectivity switch from cis-1,4 to syndio-1,2 was also achievable by adding phosphine as microstructure regulator. © 2013 Elsevier B.V. All rights reserved.
KAUST Department:
KAUST Catalysis Center (KCC); Physical Sciences and Engineering (PSE) Division; Chemical Science Program; HCL
Publisher:
Elsevier BV
Journal:
Applied Catalysis A: General
Issue Date:
Aug-2013
DOI:
10.1016/j.apcata.2013.04.026
Type:
Article
ISSN:
0926860X
Sponsors:
We are grateful for the generous financial support from King Abdullah University of Science and Technology.
Is Supplemented By:
Gong, D., Jia, W., Chen, T., & Huang, K.-W. (2013). CCDC 849285: Experimental Crystal Structure Determination [Data set]. Cambridge Crystallographic Data Centre. https://doi.org/10.5517/ccxhr9f; DOI:10.5517/ccxhr9f; HANDLE:http://hdl.handle.net/10754/624663; Gong, D., Jia, W., Chen, T., & Huang, K.-W. (2013). CCDC 849284: Experimental Crystal Structure Determination [Data set]. Cambridge Crystallographic Data Centre. https://doi.org/10.5517/ccxhr8d; DOI:10.5517/ccxhr8d; HANDLE:http://hdl.handle.net/10754/624662; Gong, D., Jia, W., Chen, T., & Huang, K.-W. (2013). CCDC 849283: Experimental Crystal Structure Determination [Data set]. Cambridge Crystallographic Data Centre. https://doi.org/10.5517/ccxhr7c; DOI:10.5517/ccxhr7c; HANDLE:http://hdl.handle.net/10754/624661
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Chemical Science Program; KAUST Catalysis Center (KCC)

Full metadata record

DC FieldValue Language
dc.contributor.authorGong, Dirongen
dc.contributor.authorJia, Weiguoen
dc.contributor.authorChen, Taoen
dc.contributor.authorHuang, Kuo-Weien
dc.date.accessioned2015-08-03T11:14:00Zen
dc.date.available2015-08-03T11:14:00Zen
dc.date.issued2013-08en
dc.identifier.issn0926860Xen
dc.identifier.doi10.1016/j.apcata.2013.04.026en
dc.identifier.urihttp://hdl.handle.net/10754/562883en
dc.description.abstractA new class of air stable and structurally well-defined cobalt complexes with unsymmetrical pincer type ligands ([2-(ArNCMe)-6-(Py)C5H 3N]CoCl2) (Ar = C6H5, Py = pyrazol-1-yl, 5a; Ar = 2,4,6-Me3C6H2, Py = pyrazol-1-yl, 5b; Ar = 2,6-iPr2C6H3, Py = pyrazol-1-yl, 5c; Ar = C6H5, Py = 3,5-Me 2pyrazol-1-yl, 5d; Ar = 2,4,6-Me3C6H 2, Py = 3,5-Me2pyrazol-1-yl, 5e; Ar = 2,6- iPr2C6H3, Py = 3,5-Me 2pyrazol-1-yl, 5f; Ar = 2,6-iPr2C 6H3, Py = 3,5-iPr2pyrazol-1-yl, 5g and [2-(OCMe)-6-(3,5-diphenylpyrazol-1-yl)C5H3N]CoCl 2 5h) were prepared and the molecular structures of 5a, 5c and 5f were determined by single crystal X-ray crystallography. Upon activation by methylaluminoxane (MAO) in toluene at room temperature, all complexes initiate polymerization of 1,3-butadiene (polymer yields: 65-99%), affording polybutadiene with excellent cis-1,4 regularity (97.5-98.7%). The polymer yields and properties in terms of molecular weight and distribution are well controlled by the substituents on iminoaryl rings and pyrazole rings. Selectivity switch from cis-1,4 to syndio-1,2 was also achievable by adding phosphine as microstructure regulator. © 2013 Elsevier B.V. All rights reserved.en
dc.description.sponsorshipWe are grateful for the generous financial support from King Abdullah University of Science and Technology.en
dc.publisherElsevier BVen
dc.subject1,3-Butadieneen
dc.subject2-(1-Arylimino)-6-(pyrazol-1-yl)pyridineen
dc.subjectCobalt(II) complexesen
dc.subjectPolybutadieneen
dc.subjectSelectivityen
dc.titlePolymerization of 1,3-butadiene catalyzed by pincer cobalt(II) complexes derived from 2-(1-arylimino)-6-(pyrazol-1-yl)pyridine ligandsen
dc.typeArticleen
dc.contributor.departmentKAUST Catalysis Center (KCC)en
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentChemical Science Programen
dc.contributor.departmentHCLen
dc.identifier.journalApplied Catalysis A: Generalen
dc.contributor.institutionDepartment of Polymer Science and Engineering, Ningbo University, Ningbo, 315211, Chinaen
kaust.authorGong, Dirongen
kaust.authorJia, Weiguoen
kaust.authorHuang, Kuo-Weien
kaust.authorChen, Taoen
dc.relation.isSupplementedByGong, D., Jia, W., Chen, T., & Huang, K.-W. (2013). CCDC 849285: Experimental Crystal Structure Determination [Data set]. Cambridge Crystallographic Data Centre. https://doi.org/10.5517/ccxhr9fen
dc.relation.isSupplementedByDOI:10.5517/ccxhr9fen
dc.relation.isSupplementedByHANDLE:http://hdl.handle.net/10754/624663en
dc.relation.isSupplementedByGong, D., Jia, W., Chen, T., & Huang, K.-W. (2013). CCDC 849284: Experimental Crystal Structure Determination [Data set]. Cambridge Crystallographic Data Centre. https://doi.org/10.5517/ccxhr8den
dc.relation.isSupplementedByDOI:10.5517/ccxhr8den
dc.relation.isSupplementedByHANDLE:http://hdl.handle.net/10754/624662en
dc.relation.isSupplementedByGong, D., Jia, W., Chen, T., & Huang, K.-W. (2013). CCDC 849283: Experimental Crystal Structure Determination [Data set]. Cambridge Crystallographic Data Centre. https://doi.org/10.5517/ccxhr7cen
dc.relation.isSupplementedByDOI:10.5517/ccxhr7cen
dc.relation.isSupplementedByHANDLE:http://hdl.handle.net/10754/624661en
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