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Volumn 26, Issue 3, 2007, Pages 751-754

Activation of polymerization catalysts: Synthesis and characterization of novel dinuclear nickel(I) diimine complexes

Author keywords

[No Author keywords available]

Indexed keywords

CATALYSTS; COMPLEXATION; ORGANOMETALLICS; POLYMERIZATION; SYNTHESIS (CHEMICAL); ULTRAVIOLET SPECTROSCOPY; X RAY DIFFRACTION;

EID: 33847242644     PISSN: 02767333     EISSN: None     Source Type: Journal    
DOI: 10.1021/om060842s     Document Type: Article
Times cited : (46)

References (32)
  • 4
    • 33847212710 scopus 로고    scopus 로고
    • In 2004 35 mio tons of PE-LD/PE-LLD and 25 mio tons of PE-HD were consumed worldwide, and consumption is estimated to grow by 5% p.a. at least until 2010. PlasticsEurope Deutschland, WG Statistics and Market Research; cf
    • In 2004 35 mio tons of PE-LD/PE-LLD and 25 mio tons of PE-HD were consumed worldwide, and consumption is estimated to grow by 5% p.a. at least until 2010. PlasticsEurope Deutschland, WG Statistics and Market Research; cf. http://www.vke.de/de/infomaterial/download/.
  • 14
    • 0033732391 scopus 로고    scopus 로고
    • (i) Hlatky, G. G. Chem. Rev. 2000, 100, 1347-1376.
    • (2000) Chem. Rev , vol.100 , pp. 1347-1376
    • Hlatky, G.G.1
  • 22
    • 33847175786 scopus 로고    scopus 로고
    • 2 complexes of sterically bulky ligands, such as N,N′-bis(2,6-(4-tert-butylphenyl) phenyl)-1,4-diazabutadiene. Therefore, the monoanionic Ni(acac) complexes were applied. Moody, L. S, Mackenzie, P. B, Killian, C. M, Lavoie, G. G, Ponasik, J. A, Jr, Barrett, A. G, Smith, T. W, Pearson, J. C. WO 00/50470, 2000
    • 2 complexes of sterically bulky ligands, such as N,N′-bis(2,6-(4-tert-butylphenyl) phenyl)-1,4-diazabutadiene. Therefore, the monoanionic Ni(acac) complexes were applied. Moody, L. S.; Mackenzie, P. B.; Killian, C. M.; Lavoie, G. G.; Ponasik, J. A., Jr.; Barrett, A. G.; Smith, T. W.; Pearson, J. C. WO 00/50470, 2000.
  • 25
    • 33847182325 scopus 로고    scopus 로고
    • Recently, investigations on monomeric anilido-imine Ni(I) complexes were published the following, (a) Wang, H.-Y.; Meng, X.; Jin, G.-X. Dalton Trans. 2006, 2579
    • Recently, investigations on monomeric anilido-imine Ni(I) complexes were published the following, (a) Wang, H.-Y.; Meng, X.; Jin, G.-X. Dalton Trans. 2006, 2579
  • 27
    • 33847234904 scopus 로고    scopus 로고
    • Due to the paramagnetic character of 1b,c NMR experiments were unsuccessful.
    • Due to the paramagnetic character of 1b,c NMR experiments were unsuccessful.
  • 30
    • 33847196676 scopus 로고    scopus 로고
    • Polymerization behavior of la was published earlier; see ref 1. The experimental results for 2a,b will be presented in future works
    • Polymerization behavior of la was published earlier; see ref 1. The experimental results for 2a,b will be presented in future works.
  • 31
    • 0033317096 scopus 로고    scopus 로고
    • Treatment of 1a and 2a with TMA in solution afforded the rapid precipitation of Ni(0). We observed, however, dissolution of this black precipitate and a blue, soluble but polymerization-inactive species formed in the presence of Al(III) activators and ethylene monomer. All trials to grow crystals suitable for X-ray analysis of the blue compound remained unsuccessful until now. Therefore, we cannot give a structural suggestion yet. UV/vis spectroscopy points toward the formation of a Ni(II)-dialkyl species. For a similar observation of such a blue compound, see: Peruch, F.; Cramail, H.; Deffieux, A. Macromolecules 1999, 32 (24), 7977-7983.
    • Treatment of 1a and 2a with TMA in solution afforded the rapid precipitation of Ni(0). We observed, however, dissolution of this black precipitate and a "blue, soluble but polymerization-inactive species" formed in the presence of Al(III) activators and ethylene monomer. All trials to grow crystals suitable for X-ray analysis of the blue compound remained unsuccessful until now. Therefore, we cannot give a structural suggestion yet. UV/vis spectroscopy points toward the formation of a Ni(II)-dialkyl species. For a similar observation of such a blue compound, see: Peruch, F.; Cramail, H.; Deffieux, A. Macromolecules 1999, 32 (24), 7977-7983.


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