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Volumn 26, Issue 16, 2007, Pages 3896-3899

Synthesis of hafnium and zirconium imino - Amido complexes from bis-imine ligands. A new family of olefin polymerization catalysts

Author keywords

[No Author keywords available]

Indexed keywords

BISIMINE LIGANDS; MIGRATORY INSERTION; OLEFIN POLYMERIZATION CATALYSTS;

EID: 34547823442     PISSN: 02767333     EISSN: None     Source Type: Journal    
DOI: 10.1021/om7004723     Document Type: Article
Times cited : (68)

References (42)
  • 2
    • 0004129985 scopus 로고    scopus 로고
    • Togni, A, Haltermann, R. L, Eds, Wiley-VCH: Weinheim, Germany, Vols, and 2
    • (b) Janiak, C. In Metallocenes; Togni, A., Haltermann, R. L., Eds.; Wiley-VCH: Weinheim, Germany, 1998; Vols. 1 and 2.
    • (1998) Metallocenes , vol.1
    • Janiak, C.1
  • 14
    • 34547726591 scopus 로고    scopus 로고
    • U.S. Patent 6,103,657 Union Carbide Corp, 2000
    • (b) Murray, R. E. U.S. Patent 6,103,657 (Union Carbide Corp.), 2000.
    • Murray, R.E.1
  • 21
    • 0000864456 scopus 로고    scopus 로고
    • This insertion chemistry is reminiscent of metal, alkyl insertion into the C=N bond of carbodiimides to produce transition-metal amidinate complexes: Sita, L. R, Babcock, J. R. Organometallics 1998, 17, 5228-5230 and references therein
    • This insertion chemistry is reminiscent of metal - alkyl insertion into the C=N bond of carbodiimides to produce transition-metal amidinate complexes: Sita, L. R.; Babcock, J. R. Organometallics 1998, 17, 5228-5230 and references therein.
  • 22
    • 0001364686 scopus 로고    scopus 로고
    • Reactions between bis-imines and main-group alkyl species (Zn, Mg, Al) are well-known: (a) Klerks, J. M.; Stufkens, D. J.; van Koten, G.; Vrieze, K. J. Organomet. Chem. 1979, 181, 271-283.
    • Reactions between bis-imines and main-group alkyl species (Zn, Mg, Al) are well-known: (a) Klerks, J. M.; Stufkens, D. J.; van Koten, G.; Vrieze, K. J. Organomet. Chem. 1979, 181, 271-283.
  • 28
    • 0037119322 scopus 로고    scopus 로고
    • There is only one example of a reaction between transition-metal alkyl complexes and bis-imines: Riollet, V.; Coperet, C.; Basset, J.-M.; Rousset, L.; Bouchu, D.; Grosvalet, L.; Perrin, M. Angew. Chem., Int. Ed. 2002, 41, 3025-3027.
    • There is only one example of a reaction between transition-metal alkyl complexes and bis-imines: Riollet, V.; Coperet, C.; Basset, J.-M.; Rousset, L.; Bouchu, D.; Grosvalet, L.; Perrin, M. Angew. Chem., Int. Ed. 2002, 41, 3025-3027.
  • 30
    • 84858107111 scopus 로고    scopus 로고
    • Preparation of 5. To a 40 mL vial was added 2.00 g (3.68 mmol) of Hf(CH2Ph)4 and 1.49 g (3.68 mmol) of N,N′-bis(2,6- diisopropylphenyl)-2,3-butanediimine followed by 8 mL of toluene to dissolve all reagents. The solution was stirred for 42 h at ambient temperature, yielding a dark orange solution. The solvent amount was reduced under reduced pressure to 4 mL. During solvent removal a yellow solid appeared. Hexane (25 mL) was added to this suspension to induce further precipitation. After the mixture was stirred for 10 min, the solid was collected on a frit, washed with 20 mL of hexanes, and dried under reduced pressure to give 2.55 g of product. The filtrate was stored overnight at -30 °C, causing the precipitation of additional solid. Upon workup (as above) a second crop of 0.3 g was isolated. Combined yield: 2.85 g, 82, 1H NMR (C6D6, 300 Hz, 23 °C, δ 7.29 dd, IH, 3JH-H, 7.8 Hz, 4
    • 2: C, 70.98; H, 7.23; N, 2.96. Found: C, 70.50; H, 7.14; N, 2.84.
  • 31
    • 84858091503 scopus 로고    scopus 로고
    • 2-N,N′,π).
    • 2-N,N′,π).
  • 33
    • 34547795632 scopus 로고    scopus 로고
    • See the Supporting Information for details
    • See the Supporting Information for details.
  • 35
    • 0344206466 scopus 로고    scopus 로고
    • For examples of a metal-bound PhCH2-B(C6F 5)3 anion, see: (a) Horton, A. D, de With, J. Organometallics 1997, 16, 5424-5436
    • 3 anion, see: (a) Horton, A. D.; de With, J. Organometallics 1997, 16, 5424-5436.
  • 39
    • 0000263666 scopus 로고    scopus 로고
    • For examples of a metal-unbound PhCH2-B(C6F 5)3 anion, see: (e) Pellecchia, C, Immirzi, A, Pappalardo, D, Peluso, A. Organometallics 1994, 13, 3773-3775
    • 3 anion, see: (e) Pellecchia, C.; Immirzi, A.; Pappalardo, D.; Peluso, A. Organometallics 1994, 13, 3773-3775.
  • 40
    • 34547807015 scopus 로고    scopus 로고
    • Reference 17c
    • (f) Reference 17c.
  • 42
    • 34547771506 scopus 로고    scopus 로고
    • Some of this work has appeared in the patent literature: Murray, R. E. U.S. Patent 6,096,676 Union Carbide Corp, 2000
    • Some of this work has appeared in the patent literature: Murray, R. E. U.S. Patent 6,096,676 (Union Carbide Corp.), 2000.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.