Synthesis, structures, dynamics, and olefin polymerization behavior of group 4 metal (pyCAr2O)2M(NR2)2 complexes containing bidentate pyridine-alkoxide ancillary ligands

Organometallics

Volumn 16, Issue 15, 1997, Pages 3314-3323

  Kim, Il ^a   Nishihara, Yasushi ^a   Jordan, Richard F ^a   Rogers, Robin D ^b   Rheingold, Arnold L ^c   Yap, Glenn P A ^c  

^a University of Iowa ^*  (United States)

^b UNIVERSITY OF ALABAMA   (United States)

^c UNIVERSITY OF DELAWARE   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0037642316     PISSN: 02767333     EISSN: None     Source Type: Journal    
DOI: 10.1021/om970236k     Document Type: Article

References (37)

1. 2M olefin polymerization catalysts.
2. (b) Tsukahara, T.; Swenson, D. C.; Jordan, R. F. Organometallics 1997, 16, 3303.
3. (c) Tsukahara, T.; Lubben, T.; Swenson, D. C.; Young, V. G., Jr.; Jordan, R. F. Manuscript in preparation.
4. (a) Diamond, G. M.; Rodewald, S.; Jordan, R. F. Organometallics 1995, 14, 5.
5. (b) Diamond, G. M.; Jordan, R. F.; Petersen, J. L. J. Am. Chem. Soc. 1996, 118, 8024.
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7. (d) Christopher, J. N.; Diamond, G. M.; Jordan, R. F.; Petersen, J. L. Organometallics 1996, 15, 4038.
8. (e) Diamond, G. M.; Jordan, R. F.; Petersen, J. L. Organometallics 1996, 15, 4045.
9. (f) Christopher, J. N.; Jordan, R. F.; Petersen, J. L.; Young, V. G., Jr. Organometallics 1997, 16, 3044.
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12. Kepert D. L. In Progress in Inorganic Chemistry; Lippard, S. L., Ed.; John Wiley & Sons: New York, 1977; Vol. 23, Chapter 1.
13. Ranges for Ti-O and Ti-N σ bond distances were estimated using covalent radii taken from the following: (a) Porterfield, W. M. Inorganic Chemistry; Academic Press: San Diego, CA, 1993; p 214 (Ti, 1.32 Å; O, 0.73 Å, N, 0.75 Å). (b) Jolly, W. L. Modern Inorganic Chemistry; McGraw-Hill, Inc.: New York, 1984, p 52 (O, 0.66 Å; N, 0.70 Å).
14. Ranges for Ti-O and Ti-N σ bond distances were estimated using covalent radii taken from the following: (a) Porterfield, W. M. Inorganic Chemistry; Academic Press: San Diego, CA, 1993; p 214 (Ti, 1.32 Å; O, 0.73 Å, N, 0.75 Å). (b) Jolly, W. L. Modern Inorganic Chemistry; McGraw-Hill, Inc.: New York, 1984, p 52 (O, 0.66 Å; N, 0.70 Å).
15. Dilworth, J. R.; Hanich, J.; Krestel, M.; Beck, J.; Strahle, J. J. Organomet. Chem. 1986, 315, C9.
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22. 2 species also contributes to the shortening of the bond distances from the values predicted on the basis of covalent radii. For a discussion and listing of key references regarding this point, see: Howard, W. A.; Trnka, T. M.; Parkin, G. Inorg. Chem. 1995, 34, 5900.
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25. c = 268 K, Δv = 43 Hz; ΔG‡ = 13.2(2) kcal/ mol.
26. The barriers estimated from changes in the aromatic region are similar but were less precisely determined due to overlapping resonances which precluded accurate determination of coalescence temperatures.
27. -1 and ΔG‡ = 12.6(3) kcal/mol. The coalescence point could not be determined due to interference from the other Ar and py resonances.
28. c = 250 K, Δv = 54 Hz; ΔG‡ = 12.2(2) kcal/mol.
29. c = 254 K, Δv = 42 Hz, ΔG‡ = 12.5(2) kcal/mol.
30. c = 298 K, Δv = 335 Hz; ΔG‡ = 14.0(1) kcal/mol.
31. Bickley, D. G.; Serpone, N. Inorg. Chem. 1979, 8, 2200.
32. 4Zr has been determined by X-ray crystallography, see: Lewis, D. F.; Fay, R. C. J. Chem. Soc., Chem. Commun. 1974, 1046.
33. (a) Larner, B.; Peters, A. T. J. Chem. Soc. 1952, 880.
34. (b) Buu-Hoi, N. P.; Royer, R.; Xuong, N. D.; Thang, K. V. Bull. Soc. Chim. Fr. 1955, 1204.
35. (a) Bradley, D. C.; Thomas, I. M. Proc. Chem. Soc. 1959, 225; J. Chem. Soc. 1960, 3857.
36. (a) Bradley, D. C.; Thomas, I. M. Proc. Chem. Soc. 1959, 225; J. Chem. Soc. 1960, 3857.
37. (b) Chisholm, M. H.; Hammond, C. E.; Huffman, J. C. Polyhedron 1988, 7, 2515.