Catalytic ethylene polymerisation in carbon dioxide as a reaction medium with soluble nickel(II) catalysts

Bastero, Amaia; Franciò, Giancarlo; Leitner, Walter; Mecking, Stefan

Catalytic ethylene polymerisation in carbon dioxide as a reaction medium with soluble nickel(II) catalysts

Dateien

Catalytic_ethylene_polymerisation_in_carbon_dioxide_as_a_reaction_medium_with.pdfGröße: 222.94 KBDownloads: 587

Datum

2006

Autor:innen

Bastero, Amaia

Franciò, Giancarlo

Leitner, Walter

Mecking, Stefan

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Chemie

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Chemistry - A European Journal. 2006, 12(23), pp. 6110-6116. ISSN 0947-6539. eISSN 1521-3765. Available under: doi: 10.1002/chem.200600499

Zusammenfassung

A series of neutral NiII salicylaldiminato complexes substituted with perfluorooctyl- and trifluoromethyl groups, [Ni{k2-N,O-6-C(H)=NAr-2,4- R 2C6H2O}(Me)(pyridine)] (6a: Ar=2,6-{4-(F17C8)C6H4}2C6H3, R =I; 6b: Ar=2,6-{4-(F3C)C6H4}2C6H3, R =I; 6c: Ar= 2,6-{3,5-(F3C)2C6H3}2C6H3, R =3,5-(F3C)2C6H3 ; 6d: Ar=2,6-{4-(F17C8)C6H4}2C6H3, R =3,5-(F3C)2-C6H3 ; 6e: Ar=2,6-{3,5-(F3C)2C6H3}2-C6H3, R =I) were studied as catalyst precursors for ethylene polymerisation in supercritical CO2.Catalyst precursors 6a and 6c, which are soluble in scCO2, afford the highest polymer yields, corresponding to 2x 103 turnovers.Semicrystallin e polyethylene (Mn typically 104 gmol -1) is obtained with variable degrees of branching (11 to 24 branches per 1000 carbon atoms, predominantly Me branches) and crystallinities (54 to 21%), depending on the substitution pattern of the catalyst.

Fachgebiet (DDC)

540 Chemie

Schlagwörter

carbon dioxide, fluorinated ligands, homogeneous catalysis, nickel, polyethylene, polymerization

Zitieren

ISO 690

BASTERO, Amaia, Giancarlo FRANCIÒ, Walter LEITNER, Stefan MECKING, 2006. Catalytic ethylene polymerisation in carbon dioxide as a reaction medium with soluble nickel(II) catalysts. In: Chemistry - A European Journal. 2006, 12(23), pp. 6110-6116. ISSN 0947-6539. eISSN 1521-3765. Available under: doi: 10.1002/chem.200600499

BibTex

@article{Bastero2006Catal-10062,
  year={2006},
  doi={10.1002/chem.200600499},
  title={Catalytic ethylene polymerisation in carbon dioxide as a reaction medium with soluble nickel(II) catalysts},
  number={23},
  volume={12},
  issn={0947-6539},
  journal={Chemistry - A European Journal},
  pages={6110--6116},
  author={Bastero, Amaia and Franciò, Giancarlo and Leitner, Walter and Mecking, Stefan}
}

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    <dcterms:abstract xml:lang="eng">A series of neutral NiII salicylaldiminato complexes substituted with perfluorooctyl- and trifluoromethyl groups, [Ni{k2-N,O-6-C(H)=NAr-2,4- R 2C6H2O}(Me)(pyridine)] (6a: Ar=2,6-{4-(F17C8)C6H4}2C6H3, R =I; 6b: Ar=2,6-{4-(F3C)C6H4}2C6H3, R =I; 6c: Ar= 2,6-{3,5-(F3C)2C6H3}2C6H3, R =3,5-(F3C)2C6H3 ; 6d: Ar=2,6-{4-(F17C8)C6H4}2C6H3, R =3,5-(F3C)2-C6H3 ; 6e: Ar=2,6-{3,5-(F3C)2C6H3}2-C6H3, R =I) were studied as catalyst precursors for ethylene polymerisation in supercritical CO2.Catalyst precursors 6a and 6c, which are soluble in scCO2, afford the highest polymer yields, corresponding to 2x 103 turnovers.Semicrystallin e polyethylene (Mn typically 104 gmol -1) is obtained with variable degrees of branching (11 to 24 branches per 1000 carbon atoms, predominantly Me branches) and crystallinities (54 to 21%), depending on the substitution pattern of the catalyst.</dcterms:abstract>
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