Electrophilic metal precursors and a β-diimine ligand for nickel(II)- and palladium(II)-catalyzed ethylene polymerization

Organometallics

Volumn 16, Issue 8, 1997, Pages 1514-1516

  Feldman, Jerald ^a   McLain, Stephan J ^a   Parthasarathy, Anju ^a   Marshall, William J ^a   Calabrese, Joseph C ^a   Arthur, Samuel D ^a  

^a DUPONT COMPANY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0000612624     PISSN: 02767333     EISSN: None     Source Type: Journal    
DOI: 10.1021/om960968x     Document Type: Article

References (36)

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5. Experimental details are given in the Supporting Information.
6. - is a relatively coordinating anion: Beck, W.; Sünkel, K. Chem. Rev. 1988, 88, 1405.
7. - is a relatively coordinating anion: Beck, W.; Sünkel, K. Chem. Rev. 1988, 88, 1405.
8. n = 1.4) vs linear polyethylene; polymer contained 100 methyl-ended branches per 1000 methylene units.
9. n = 1.9) vs linear polyethylene in trichlorobenzene.
10. 6Pd: C, 50.94; H, 6.17; N, 9.90. Found: C, 50.52; H, 6.17; N, 959.
11. n = 1.8) vs linear polyethylene; polymer contained 94 methyl-ended branches per 1000 methylene units.
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22. 9gj The recent preparation of well-defined Pd(II) alkyl and allyl catalysts for norbornene/norbornadiene polymerizations also suggests an insertion type mechanism: (a) Safir, A. L.; Novak, B. M. Macromolecules 1995, 28, 5396. (b) Safir, A. L.; Novak, B. M. Polym. Prepr., Am. Chem. Soc. Div. Polym. Chem. 1994, 35, 901. (c) Goodall, B. L.; Benedikt, G. M.; McIntosh, L. H.; Barnes, D. A. U.S. Patent 5, 468, 819, Nov 21, 1995. (d) Reinmuth, A.; Mathew, J. P.; Melia, J.; Risse, W. Makromol. Chem., Rapid Commun. 1996, 17, 173.
23. 9gj The recent preparation of well-defined Pd(II) alkyl and allyl catalysts for norbornene/norbornadiene polymerizations also suggests an insertion type mechanism: (a) Safir, A. L.; Novak, B. M. Macromolecules 1995, 28, 5396. (b) Safir, A. L.; Novak, B. M. Polym. Prepr., Am. Chem. Soc. Div. Polym. Chem. 1994, 35, 901. (c) Goodall, B. L.; Benedikt, G. M.; McIntosh, L. H.; Barnes, D. A. U.S. Patent 5, 468, 819, Nov 21, 1995. (d) Reinmuth, A.; Mathew, J. P.; Melia, J.; Risse, W. Makromol. Chem., Rapid Commun. 1996, 17, 173.
24. 9gj The recent preparation of well-defined Pd(II) alkyl and allyl catalysts for norbornene/norbornadiene polymerizations also suggests an insertion type mechanism: (a) Safir, A. L.; Novak, B. M. Macromolecules 1995, 28, 5396. (b) Safir, A. L.; Novak, B. M. Polym. Prepr., Am. Chem. Soc. Div. Polym. Chem. 1994, 35, 901. (c) Goodall, B. L.; Benedikt, G. M.; McIntosh, L. H.; Barnes, D. A. U.S. Patent 5, 468, 819, Nov 21, 1995. (d) Reinmuth, A.; Mathew, J. P.; Melia, J.; Risse, W. Makromol. Chem., Rapid Commun. 1996, 17, 173.
25. 9gj The recent preparation of well-defined Pd(II) alkyl and allyl catalysts for norbornene/norbornadiene polymerizations also suggests an insertion type mechanism: (a) Safir, A. L.; Novak, B. M. Macromolecules 1995, 28, 5396. (b) Safir, A. L.; Novak, B. M. Polym. Prepr., Am. Chem. Soc. Div. Polym. Chem. 1994, 35, 901. (c) Goodall, B. L.; Benedikt, G. M.; McIntosh, L. H.; Barnes, D. A. U.S. Patent 5, 468, 819, Nov 21, 1995. (d) Reinmuth, A.; Mathew, J. P.; Melia, J.; Risse, W. Makromol. Chem., Rapid Commun. 1996, 17, 173.
26. Novak, B. M.; Safir, A. L. Polym. Prepr., Am. Chem. Soc. Div. Polym. Chem. 1996, 37, 335.
27. n = 670). Thus, water appears to serve as a chain transfer agent. We further conclude that, if adventitious water is playing a role in catalyst initiation, it need be present in only trace amounts.
28. n = 128).
29. Full details are given in the Supporting Information. Ligands of this type have been prepared previously: Parks, J. E.; Holm, R. H. Inorg. Chem. 1968, 7, 1408.
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32. Honeybourne, C. L.; Webb, G. A. Chem. Commun. 1968, 739.
33. w = 0.037, error of fit = 1.15, max Δ/σ = 0.24.
34. 2Ni: C, 54.67; H, 6.64; N, 4.40. Found: C, 54.38; H, 6.74; N, 4.29.
35. f = 155 J/g.
36. Keim, W.; Schulz, R. P. J. Mol. Catal. 1994, 92, 21.