Cationic alkylzirconium complexes based on a tridentate diamide ligand: New alkene polymerization catalysts

Organometallics

Volumn 15, Issue 12, 1996, Pages 2672-2674

  Horton, Andrew D ^a   De With, Jan ^a   Van Der Linden, Arjan J ^a   Van De Weg, Henk ^a  

^a SHELL RESEARCH AND TECHNOLOGY CENTRE   (Netherlands)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 5844237829     PISSN: 02767333     EISSN: None     Source Type: Journal    
DOI: 10.1021/om960073k     Document Type: Article

References (38)

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15. A zirconium diamide/methylaluminoxane polymerization catalyst has very recently been reported: Cloke, F. G. N.; Geldbach, T. J.; Hitchcock, P. B.; Love, J. B. J. Organomet. Chem. 1996, 506, 343.
16. For very recent examples of group 4 complexes with chelating diamide ligands, see refs 9, 13, and 14 and the following: (a) Aoyagi, K.; Gantzel, P. K.; Kalai, K.; Tilley, T. D. Organometallics 1996, 15, 923. (b) Warren, T. H.; Schrock, R. R.; Davis, W. M. Organometallics 1996, 15, 562. (c) Scollard, J. D.; McConville, D. H.; Vittal, J. J. Organometallics 1995, 14, 5478.
17. For very recent examples of group 4 complexes with chelating diamide ligands, see refs 9, 13, and 14 and the following: (a) Aoyagi, K.; Gantzel, P. K.; Kalai, K.; Tilley, T. D. Organometallics 1996, 15, 923. (b) Warren, T. H.; Schrock, R. R.; Davis, W. M. Organometallics 1996, 15, 562. (c) Scollard, J. D.; McConville, D. H.; Vittal, J. J. Organometallics 1995, 14, 5478.
18. For very recent examples of group 4 complexes with chelating diamide ligands, see refs 9, 13, and 14 and the following: (a) Aoyagi, K.; Gantzel, P. K.; Kalai, K.; Tilley, T. D. Organometallics 1996, 15, 923. (b) Warren, T. H.; Schrock, R. R.; Davis, W. M. Organometallics 1996, 15, 562. (c) Scollard, J. D.; McConville, D. H.; Vittal, J. J. Organometallics 1995, 14, 5478.
19. 0 metals with chelating diamide or triamide ligands, see the following and references therein: (a) Vaughan, W. M.; Abboud, K. A.; Boncella, J. M. J. Am. Chem. Soc. 1995, 117, 11015. (b) Freundlich, J. S.; Schrock, R. R.; Cummins, C. C.; Davis, W. M. J. Am. Chem. Soc. 1994, 116, 6476.
20. 0 metals with chelating diamide or triamide ligands, see the following and references therein: (a) Vaughan, W. M.; Abboud, K. A.; Boncella, J. M. J. Am. Chem. Soc. 1995, 117, 11015. (b) Freundlich, J. S.; Schrock, R. R.; Cummins, C. C.; Davis, W. M. J. Am. Chem. Soc. 1994, 116, 6476.
21. Andersen, R. A. Inorg. Chem. 1979, 18, 2928.
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23. Clark, H. C. S.; Cloke, F. G. N.; Hitchcock, P. B.; Love, J. B.; Wainwright, A. P. J. Organomet. Chem. 1995, 503, 333.
24. 13
25. Horton, A. D.; de With, J.; van der Linden, A. J.; van de Weg, H. Unpublished results.
26. 3 (each 0.01 mmol) in a 10 mL bottle at -30 °C, followed by rapid warming to 0 °C and transfer to an NMR tube. Although 4, 6, and 9 are formed quantitatively (>95% NMR purity), attempts to isolate the complexes in analytically pure crystalline form have not been successful.
27. 13
28. CH = 120, 124 Hz); ortho H, δ 6.86, 6.78 ppm.
29. 3).
30. Schematic representation of one of two possible trigonal bipyramidal isomers (axial/equatorial groups exchanged) for 4 and 6-9 is arbitrary. A single species is observed spectroscopically.
31. Pellecchia, C.; Immirzi, A.; Grassi, A.; Zambelli, A. Organometallics 1993, 12, 4473.
32. (a) Latesky, S. L.; McMullen, A. K.; Niccolai, G. P.; Rothwell, I. P.; Huffman, J. C. Organometallics 1985, 4, 902.
33. (b) Bochmann, M.; Lancaster, S. J. Organometallics 1993, 12, 633.
34. 0 metals (values 3-6 ppm indicate coordination; <3 ppm indicates noncoordination): Horton, A. D. Unpublished results.
35. Yang, X.; Stern, C. L.; Marks, T. J. J. Am. Chem. Soc. 1994, 116, 10015.
36. Horton, A. D.; Orpen, A. G. Organometallics 1991, 10, 3910.
37. + the μ-Me resonates ca. 1 ppm upfield of the terminal methyl: Bochmann, M.; Lancaster, S. J. Angew. Chem., Int. Ed. Engl. 1994, 33, 1634.
38. Horton, A. D.; de With, J. Chem. Commun., in press.