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Volumn 42, Issue 5, 2004, Pages 1164-1173

Effects of Tris(pentafluorophenyl)borane on the Activation of a Metal Alkyl-free Ni-Based Catalyst in the Polymerization of 1,3-Butadiene

Author keywords

1,3 butadiene polymerization; Metal alkyl free Ni based catalyst; Tris(pentafluorophenyl)borane

Indexed keywords

ACIDITY; BENZENE; BUTADIENE; CATALYSIS; CATALYSTS; MOLECULAR WEIGHT; NICKEL; POLYMERIZATION; TOLUENE;

EID: 1542334542     PISSN: 0887624X     EISSN: None     Source Type: Journal    
DOI: 10.1002/pola.11062     Document Type: Article
Times cited : (22)

References (34)
  • 23
    • 85039571135 scopus 로고    scopus 로고
    • note
    • 16 To the solution was added 3 g of 1,3-butadiene, and the reaction mixture was stirred further for 2 h at 40°C. However, no polymerization was induced from the two reactions.
  • 24
    • 85039570802 scopus 로고    scopus 로고
    • note
    • The oxidation state of complexes 2 and 4 is 0. Nonetheless, only complex 2 gave catalytic activity. This shows that the important factor inducing polymerization in the absence of metal alkyl compound is the easiness of the ligand exchange reaction between the ligand in metal complex and 1,3-butadiene rather than the oxidation state of metal. Both carboxylate and diimine ligands in complexes 1 (Ni(II)) and 3 (Ni(II)), respectively, would be hardly displaced by 1,3-butadiene due to their stronger coordination with Ni.
  • 26
    • 85039581297 scopus 로고    scopus 로고
    • note
    • 3 to come around it.
  • 28
    • 85039564549 scopus 로고    scopus 로고
    • note
    • 19F NMR spectra of these materials did not give significant information on the catalytic complexes due to the poor resolution and the complexity of the absorption peaks, respectively.
  • 29
    • 85039567841 scopus 로고    scopus 로고
    • note
    • -4 mol) in 5 mL of toluene was added to the solution, and the reaction mixture was stirred further for l h at 0°C. Evaporation of solvent at reduced pressure provided crude products, which were washed several times with dried-pentane under nitrogen atmosphere before analysis. For the details, see ref. 21.
  • 30
    • 85039569429 scopus 로고    scopus 로고
    • note
    • 2. For the details, see ref. 22.
  • 31
    • 85039566014 scopus 로고    scopus 로고
    • note
    • On the other hand, the polymerization performed at [MAO]/[Ni] = 3 did not give any catalytic activity.
  • 34
    • 85039573524 scopus 로고    scopus 로고
    • note
    • The π-electrons from the aromatic solvent can be donated into the vacant d orbital of the Ni atom, which contributes to stabilize Ni complex against decomposition, thus enhancing catalytic activity.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.