B NMR analysis of catalyst solutions obtained from bis(boratabenzene)zirconium dichloride complexes and methylaluminoxane

Organometallics

Volumn 21, Issue 15, 2002, Pages 3189-3195

  Komon, Zachary J A ^a   Rogers, Jonathan S ^a   Bazan, Guillermo C ^a  

^a UNIVERSITY OF CALIFORNIA   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

STERIC EFFECTS;

BENZENE; CATALYSTS; COMPLEXATION; DIMERIZATION; ISOMERIZATION; ZIRCONIUM COMPOUNDS;

ORGANOMETALLICS;

EID: 0013528749     PISSN: 02767333     EISSN: None     Source Type: Journal    
DOI: 10.1021/om010972v     Document Type: Article

References (44)

1. (a) Herberich, G. E.; Greiss, G.; Heil, H. F. Angew. Chem., Int. Ed. Engl. 1970, 9, 805. Review:
2. (b) Herberich, G. E. Comprehensive Organometallic Chemistry II; Abel, E. W., Stone, F. G. A., Wilkinson, G., Eds.; Pergamon Press: Oxford, U.K., 1995; Vol. 1, p 197.
3. (c) Fu, G. C. Adv. Organomet. Chem. 2001, 47, 101.
4. (a) Chen, E. Y.-X.; Marks, T. J. Chem. Rev. 2000, 700, 1391.
5. (b) Reddy, S. S.; Sivaram, S. Prog. Polym. Sci. 1995,20,309.
6. (c) Kaminsky, W.; Miri, M.; Sinn, H.; Woldt, R. Makromol. Chem., Rapid Commun. 1983, 4, 417.
7. (a) Komon, Z. J. A.; Bazan, G. C. Spec. Publ.-R. Soc. Chem. 2000, 253 (Contemporary Boron Chemistry), 3-9.
8. (b) Ashe, A. J.; Al-Ahmad, S.; Fang, X. G. J. Organomet. Chem. 1999, 581, 92.
9. Bazan, G. C.; Rodriguez, G.; Ashe, A. J., III; Al-Ahmad, S.; Kampf, J. W. Organometallics 1997, 16, 2492.
10. Bazan, G. C.; Rodriguez, G.; Ashe, A. J., III; Al-Ahmad, S.; Müller, C. J. Am. Chem. Soc. 1996, 118, 2291.
11. Rogers, J. S.; Bazan, G. C.; Sperry, C. K. J. Am. Chem. Soc. 1997, 119. 9305.
12. (a) Lappin, G. R.; Nemec, L. H.; Sauer, J. D.; Wagner, J. D. In Kirk-Othmer Encyclopedia of Chemical Technology; Kroschwilz, J. I., Howe-Grant, M., Eds.; Wiley: New York, 1996; Vol. 17, p 839.
13. (b) Parshall, G. W.; Ittel, S. D. Homogeneous Catalysis, 2nd ed.; Wiley: New York, 1992.
14. (c) Freitas, E. R.; Gum, C. R. Chem. Eng. Prag. 1979, 75, 73.
15. Herberich, G. E.; Englert, U.; Schmitz, A. Organometallics 1997, 16, 3751.
16. Rogers, J. S.; Lachicotte, R. J.; Bazan, G. C. J. Am. Chem. Soc. 1999, 121, 1288.
17. (a) Lee, R. A.; Lachicotte, R. J.; Bazan, G. C. .7. Am. Chem. Soc. 1998,120, 6037.
18. (b) Bazan, G. C.; Cotter, W. D.; Komon, Z. J. A.; Lee, R. A.; Lachicotte, R. J., 7. Am. Chem. Soc. 2000, 122, 1371.
19. 13C NMR analysis of group 4 metallocene/MAO mixtures, see: (a) Sishta, C.; Hathorn, R. M.; Marks, T. J. J. Am. Chem. Soc. 1992, 114, 1112.
20. (b) Tritto, I; Li, S.; Sacchi, M. C.; Zannoni, G. Macromolecules 1993, 26, 7113.
21. (c) Tritto, J.; Sacchi, M. C.; Li, S. Macromol. Rapid Commun. 1994,15, 217.
22. (d) Tritto, I.; Donetti, R.; Sacchi, M. C.; Locatelli, P.; Zannoni, G. Macromolecules 1997, 30, 1248.
23. (e) Tritto, I.; Donetti, R.; Sacchi, M. C.; Locatelli, P.; Zannoni, G. Macromolecules 1999, 32, 264.
24. (f) Babushkin, D. E.; Semikolenova, N. V.; Zakharov, V. A.; Talsi, E. P. Macromol. Chem. Phys. 2000,207, 558.
25. (g) Tritto, I.; Sacchi, M. C.; Locatelli, P.; Forlini, F. Organometallic Catalysts and Olefin Polymerization; Blom, R., Follestad, A., Rytter, E., Tilset, M., Ystenes, M., Eds.; SpringerVerlag: Berlin, Heidelberg, 2001; p 253.
26. Group 4 metallocene/MAO mixtures have been studied by FTIR; see: Eilertsen, J. L.; Rytter, E.; Ystenes, M. In Organometallic Catalysts and Olefin Polymerization; Blom, R., Follestad, A., Rytter, E., Tilset, M., Ystenes, M., Eds.; Springer-Verlag: Berlin, Heidelberg, 2001; p 86.
27. UV/Vis spectroscopic studies on group 4 metallocene/MAO mixtures has been carried out; see: Wieser, U.; Brintzinger, H.-H. Organometallic Catalysts and Olefin Polymerization; Blom, R., Follestad, A., Rytter, E., Tilset, M., Ystenes, M., Eds.; Springer-Verlag: Berlin, Heidelberg, 2001; p 3.
28. Tullo, A. H. Chem. Eng. News 2001, 79(43), 38.
29. Sinn, H., Kaminaky, W., Hoker, H., Eds. Alumoxanes: Macromolecular Symposia 97; Huthig and Wepf: Heidelberg, Germany, 1995.
30. Rytter, E.; Ystenes, M.; Eilertsen, J. L.; Ott, M.; Støvneng, J. A.; Liu, J. Organometallic Catalysts and Olefin Polymerization; Blom, R., Follestad, A., Rytter, E., Tilset, M., Ystenes, M., Eds.; SpringerVerlag: Berlin, Heidelberg, 2001; p 23.
31. DFT calculations on different MAO structures have been carried out; see: Zurek, E.; Woo, T. K.; Firman, T. K.; Ziegler, T. Organometallic Catalysts and Olefin Polymerization; Blom, R., Follestad, A., Rytter, E., Tilset, M., Ystenes, M., Eds.; Springer-Verlag: Berlin, Heidelberg, 2001; p 109.
32. MAO structures have been probed using EPR techniques; see: Talsi, E. P.; Semikolenova, N. V.; Panchenko, V. N.; Sobolev, A. P.; Babushkin, D. E.; Shubin, A. A.; Zakharov, V. A. J. Mol. Catal. A 1999, 139 131
33. Atwood, D. A.; Jegier, J. A.; Liu, S.; Rutherford, D.; Wei, P.; Tucker, R. C. Organometallics 1999, 18, 976.
34. 91Zr NMR spectroscopy; see: Siedle, A. R.; Lamanna, W. M.; Newmark, R. A.; Schroepfer, J. N. J. Mol. Catal. A 1998, 128, 257.
35. Kallio, K.; Kauhanen, J. In Organometallic Catalysts and Olefin Polymerization; Blom, R., Follestad, A., Rytter, E., Tilset, M., Ystenes, M., Eds.; Springer-Verlag: Berlin, Heidelberg, 2001; p 14.
36. 2O.
37. These numbers match well other resonance assignments in the literature. See: Herberich, G. E.; Englert, U.; Schmitz, A. Organometallics 1997,16,3751.
38. Coevoet, D.; Cramail, H.; Deffieux, A.; Mladenov, C.; Pedeutour, J.-N.; Peruch, F. Polym. Int. 1999, 48, 257.
39. Pedeutour, J.-N.; Coevoet, D.; Cramail, H.; Deffieux, A. Macromol. Chem. Phys. 1999, 200, 1215.
40. These systems have been modeled using DFT calculations; see: Fusco, R.; Longo, L.; Masi, F.; Garbassi, F. Macromolecules 1997, 30, 7673.
41. Qiao, S.; Holc, D. A.; Fu, G. C. J. Am. Chem. Soc. 1996, 118, 6329.
42. 2 complex, which undergoes further reaction to give B-Me. Similar kinds of processes can be envisioned for R = cyclohexyl, benzyl. However, with R = Et, Me, one would expect much slower rates (none for Me).
43. Burger, B. J.; Bercaw, J. E. In Experimental Organometallic Chemistry; Wayda, A. L., Darensbourg, M. Y., Eds.; ACS Symposium Series 357; American Chemical Society: Washington, DC, 1987.
44. Hoic, D. A.; Wolf, J. R.; Davis, W. M.; Fu, G. C. Organometallics 1996, 15, 1315.