Selective dimerization/oligomerization of α-olefins by cobalt bis(imino)pyridine catalysts stabilized by trifluoromethyl substituents: Group 9 metal catalysts with productivities matching those of iron systems

Organometallics

Volumn 24, Issue 2, 2005, Pages 280-286

  Tellmann, Kilian P ^a   Gibson, Vernon C ^a   White, Andrew J P ^a   Williams, David J ^a  

^a IMPERIAL COLLEGE LONDON   (United Kingdom)

Author keywords

[No Author keywords available]

Indexed keywords

CATALYSTS; COBALT COMPOUNDS; CRYSTAL STRUCTURE; DIMERIZATION; IRON; ISOMERIZATION; OLIGOMERS;

CATALYST STABILITY; CHAIN GROWTH; LIGANDS; TRIMERS;

OLEFINS;

EID: 12844287560     PISSN: 02767333     EISSN: None     Source Type: Journal    
DOI: 10.1021/om049297q     Document Type: Article

References (31)

1. (a) Britovsek, G. J. P.; Gibson, V. C.; Kimberley, B. S.; Solan, G. A.; White, A. J. P.; Williams, D. J. Chem. Commun. 1998, 849.
2. (b) Small, B. L.; Brookhart, M.; Bennett, A. M. A. J. Am. Chem. Soc. 1998, 120, 4049.
3. (c) Britovsek, G. J. P.; Bruce, M.; Gibson, V. C.; Kimberley, B. S.; Maddox, P. J.; Mastroianni, S.; McTavish, S. J.; Redshaw, C.; Solan, G. A.; Strömberg, S.; White, A. J. P.; Williams, D. J. J. Am. Chem. Soc. 1999, 121, 8728.
4. (a) Small, B. L.; Brookhart, M. J. Am. Chem. Soc. 1998, 120, 7143.
5. (b) Britovsek, G. J. P.; Mastroianni, S.; Solan, G. A.; Baugh, S. P. D.; Redshaw, C.; Gibson, V. C.; White, A. J. P.; Williams, D. J.; Elsegood, M. R. J. Chem. Eur. J. 2000, 6, 2221.
6. Reardon, D.; Conan, F., Gambarotta, S.; Yap, G.; Wang, Q. J. Am. Chem. Soc. 1999, 121, 9318.
7. Esteruelas, M. A.; López, A. M.; Méndez, L.; Oliván, M.; Oñate, E. Organometallics 2003, 22, 395.
8. See: Gibson, V. C.; Spitzmesser, S. K. Chem. Rev. 2003, 103, 283 for leading references.
9. Bennett, A. M. A. (DuPont) World Patent 61550, 1999.
10. Small, B. L. Organometallics 2003, 22, 3178.
11. (a) Chen, Y.; Qian, C.; Sun, J. Organometallics 2003, 22, 1231.
12. (b) Chen, Y.; Chen, R.; Qian, C.; Dong, X.; Sun, J. Organometallics 2003, 22, 4312.
13. 4
14. The complexes were at times already of analytical purity at this point. Satisfactory elemental analyses have been obtained for all complexes by recrystallization from dichloromethane/hexane.
15. Complex 2c has recently been claimed, but no characterization data were reported. Pelascini, F.; Peruch, F.; Lutz, P.; Wesolek, M.; Kress, J. Macromol. Rapid. Commun. 2003, 24, 768.
16. Drew, M. G. B.; Hollis, S. Acta Crystallogr. 1978, B34, 2853.
17. Gibson, V. C., McTavish, S.; Redshaw. C.; Solan, G. A.; White, A. J. P.; Williams, D. J. Dalton 2003, 221.
18. 3 is hydrolyzed.
19. -1 in a 60 min run at 1.0 bar of ethylene pressure (α = 0.71).
20. (a) Tian, J.; Hustad, P.; Coates, G. W. J. Am. Chem. Soc. 2001, 123, 5134.
21. (b) Saito, J.; Mitani, M.; Mohri, J.; Yoshida, Y.; Matsui, S.; Ishii, S.; Kojoh, S.; Kashiwa, N.; Fujita, T. Angew. Chem., Int. Ed. 2001, 40, 2918.
22. Reinartz, S.; Mason, A. F.; Lobkovsky, E. B.; Coates, G. W. Organometallics 2003, 22, 2542.
23. Small, B. L.; Brookhart, M. Macromolecules 1999, 32, 2120.
24. -1 in Table 2.
25. Cornils, B., Hermann, W. A., Eds. Applied Homogeneous Catalysis with Organometallic Compounds; Wiley-VCH: Weinheim, Germany, 2002.
26. Gibson, V. C.; Humphries, M. J.; Tellmann, K. P.; Wass, D. F.; White, A. J. P.; Williams, D. J. Chem. Commun. 2001, 2252.
27. Kooistra, T. M.; Knijnenburg, Q.; Smits, J. M. M.; Horton, A. D.; Budzelaar, P. H. M.; Gal, A. W. Angew. Chem., Int. Ed. 2001, 40, 4719.
28. (a) Gibson, V. C.; Tellmann, K. P.; Humphries, M. J.; Wass, D. F. Chem. Commun. 2002, 2316.
29. (b) Tellmann, K. P.; Humphries, M. J.; Rzepa, H.S Gibson, V. C. Organometallics 2004, 23, 5503.
30. Chain termination normally occurs exclusively by β-H elimination/transfer in cobalt bis(imino)pyridine catalysts, regardless of ligand size.
31. At least in the absence of chain walking, a phenomenon only observed in certain group 10 complexes, but for which no evidence is seen in 2c/MAO or closely related group 9 catalysts. For leading references concerning chain walking in group 10 metal complexes, see: Ittel, S. D.; Johnson, L. K.; Brookhart, M. Chem. Rev. 2000, 100, 1169 and references therein.