Titanium and zirconium complexes containing modified TREN ligands for the polymerization of 1-alkenes - A comparative study

Journal of Polymer Science, Part A: Polymer Chemistry

Volumn 45, Issue 23, 2007, Pages 5470-5479

  Sudhakar, Padmanabhan ^a  

^a INDIAN INSTITUTE OF TECHNOLOGY MADRAS   (India)

Author keywords

Gel permeation chromatography; Isotactic; Living polymerization; Polyhexene

Indexed keywords

GEL PERMEATION CHROMATOGRAPHY; LIVING POLYMERIZATION; MOLECULAR WEIGHT; OLEFINS; TITANIUM COMPOUNDS; ZIRCONIUM COMPOUNDS;

LIVING SYSTEMS; POLYHEXENE; ZIRCONIUM COMPLEXES;

LIGANDS;

EID: 36549040046     PISSN: 0887624X     EISSN: 10990518     Source Type: Journal    
DOI: 10.1002/pola.22291     Document Type: Article

References (25)

1. For review on living polymerization of alkenes see (a) Coates, G. W.; Hustad, P. D.; Reinartz, S. Angew Chem Int Ed Engl 2002, 41, 2236;
2. (b) Domski, G. J.; Rose, J. M.; Coates, G. W.; Bolig, A. D.; Brookhart, M. Prog Polym Sci 2007, 32, 30.
3. For examples of living polymerization of α-olefins with Zr and Hf precatalysts with NON ligand systems see (a) Liang, L.; Schrock, R. R.; Davis, W M.; McConville, D. H. J Am Chem Soc 1999, 121, 5797;
4. For examples of living polymerization of α-olefins with Zr acetamidinates see (b) Harney, M. B; Keaton, R. J.; Sita, L. R. J Am Chem Soc 2004, 126, 4536;
5. For examples of living polymerization by ligand structure modifications see (c) Groysman, S.; Goldberg, I.; Kol, M.; Genizi, E.; Goldschmidt, Z. Organometallics 2003, 22, 3013;
6. s-symmetric catalyst precursor see Domski, G. J.; Lobkovsky, E. B.; Coates, G. W. Macromolecules 2007, 40, 3510.
7. For a review see Gibson, V. C.; Spitzmesser, S. K. Chem Rev 2003, 103, 283.
8. (a) Ewen, J.; Elder M. J.; Jones, R. L.; Haspeslagh, L.; Atwood, L. J.; Bott, S. G.; Robinson, K. Makromol Chem Macromol Symp 1991, 48/49, 253;
9. (b) Kaminsky, W.; Kupler, K.; Brintzinger, H. H.; Wild, F. R. W. P. Angew Chem Int Ed Engl 1985, 97, 507;
10. (c) Gomez, F. J.; Waymouth, R. M. Science 2002, 295, 635.
11. (a) Manivannan, R.; Sundararajan, G. Macromolecules 2002, 35, 7883;
12. (b) Manivannan, R.; Sundararajan, G.; Kaminsky, W. Macromol Rapid Commun 2000, 21, 968.
13. Sudhakar, P.; Sundararajan, G. Macromol Rapid Commun 2005, 26, 1854.
14. From the literature, we infer that triethanolamine based titanium precatalysts bearing a cyclopentadienyl ligand polymerize styrene to give syndiotactic polystyrene in good yields;Kim, Y.; Hong, E.; Lee, M. H.; Kim, J.; Han, Y; Do, Y. Organometallics 1999, 18, 36.
15. (a) Sudhakar, P.; Amburose, V.; Nethaji, M.; Sundararajan, G. Organometallics 2004, 23, 4462;
16. (b) Sudhakar, P.; Sundararajan, G. J Polym Sci Part A: Polym Chem 2006, 44, 4006.
17. Nugent, W. A.; Harlow, R. L. J Am Chem Soc 1994, 116, 6142.
18. The choice of the solvents was based on the literature reports for the similar type of catalysts used for α-olefin polymerization. See, Scollard, J. D.; McConville, D. H. J Am Chem Soc 1996, 118, 10008.
19. Babu, G. N.; Newmark, R. A.; Chien, J. C. W. Macromolecules 1994, 27, 3383.
20. (a) Longo, P.; Oliva, L.; Grassi, A.; Pellecchia C. Makromol Chem 1989, 190, 2357;
21. (b) Herfert, N.; Fink, G. Makromol Chem 1992, 193, 1359;
22. (c) Coevoet, D.; Cramail, H.; Deffieux, A. Macromol Chem Phys 1998, 199, 1459.
23. (a) Averbuj, C.; Tish, E.; Eisen, M. S. J Am Chem Soc 1998, 120, 8640; For the suggestion of a formal loss of an aryloxide arm of a tripodal ligand from the metal center during polymerization, see:
24. (b) Wang, W.; Fujiki, M.; Nomura, K. Macromol Rapid Commun 2004, 25, 504.
25. Ewen, J. J Am Chem Soc 1984, 104, 6355.