Methane loss from cationic μ-methyl dimers formed via trityl borate activation of monocyclopentadienyl ketimide complexes Cp[(tBu)2C=N]Ti(CH3)2 (Cp = C5H5, C5Me5, C5Me4SiMe3)

Organometallics

Volumn 20, Issue 10, 2001, Pages 2088-2092

  Zhang, Suobo ^a   Piers, Warren E ^a  

^a UNIVERSITY OF CALGARY   (Canada)

Author keywords

[No Author keywords available]

Indexed keywords

CATIONIC METHYL DIMERS; LIGANDS; MESO DIASTEREOMERS; METHANE LOSS; MONOCYCLOPENTADIENYL KETIMIDE COMPLEXES; MONOCYCLOPENTADIENYL TITANIUM DIMETHYL COMPOUNDS; RAC DIASTEREOMERS; TRITYL BORATE ACTIVATION;

BORON COMPOUNDS; CHEMICAL ACTIVATION; DIMERS; DISSOCIATION; METHANE; MIXTURES; NEGATIVE IONS; NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY; POSITIVE IONS; SOLUTIONS; TEMPERATURE;

TITANIUM COMPOUNDS;

EID: 0035858976     PISSN: 02767333     EISSN: None     Source Type: Journal    
DOI: 10.1021/om010130w     Document Type: Article

References (23)

1. Chen, E. Y.-X.; Marks, T. J. Chem. Rev. 2000, 100, 1391.
2. Chien, J. C. W.; Rausch, M. D.; Tsai, W.-M. J. Am. Chem. Soc. 1991, 113, 8570.
3. (a) Bochmann, M.; Lancaster, S. J. Angew. Chem., Int. Ed. Engl. 1994, 33, 1634.
4. (b) Bochmann, M.; Green, M. L. H.; Powell, A. K.; Sassmannshausen, J.; Triller, M. U.; Wocadlo, S. J. Chem. Soc., Dalton Trans. 1999, 43.
5. (c) Bochmann, M.; Lancaster, S. J. J. Organomet. Chem. 1992, 434, C1.
6. (d) Bochmann, M. Angew. Chem., Int. Ed. Engl. 1992, 31, 1181.
7. For examples of μ-methyl dimer formation in non-Cp systems, see: (a) Coles, M. P.; Jordan, R. F. J. Am. Chem. Soc. 1997, 119, 8125.
8. (b) Mehrkhodavandi, P.; Bonitatebus, P. J., Jr.; Schrock, R. R. J. Am. Chem. Soc. 2000, 122, 7841.
9. Chen, Y.-X.; Stern, C. L.; Yang, S.; Marks, T. J. J. Am. Chem. Soc. 1996, 118, 12451.
10. Chen, E. Y.-X.; Metz, M. V.; Li, L.; Stern, C. L.; Marks, T. J. J. Am. Chem. Soc. 1998, 120, 6287.
11. Ozawa, F.; Park, J. W.; Mackenzie, P. B.; Schaefer, W. P.; Henling, L. M.; Grubbs, R. H. J. Am. Chem. Soc. 1989, 111, 1319.
12. Jia, L.; Yang, X.; Stern, C. L.; marks, T. J. Organometallics 1997, 16, 842.
13. Chen, Y.-X.; Marks, T. J. Organometallics 1997, 16, 3649.
14. Beck, S.; Prosenc, M.-H.; Brintzinger, H.-H. Goretski, R.; Herfert, N.; Fink, G. J. Mol. Catal. A 1996, 111, 67.
15. (a) Beck, S.; Geyer, A.; Brintzinger, H.-H. Chem. Commun. 1999, 2477.
16. (b) Beck, S.; Lieber, S.; Schaper, F.; Geyer, A.; Brintzinger, H.-H. J. Am. Chem. Soc. 2001, 123, 1483.
17. (a) Zhang, S.; Piers, W. E.; Gao, X.; Parvez, M. J. Am. Chem. Soc. 2000, 122, 5499.
18. (b) McMeeking, J.; Gao, X.; Spence, R. E. v. H.; Brown, S. J.; Jeremic, D. PCT WO 99/14250, 1999 (Nova Chemical Ltd.).
19. Bochmann, M.; Cuenca, T.; Hardy, D. T. J. Organomet. Chem 1994, 484, C10.
20. 1H NMR spectroscopy.
21. A zirconium compound related to dimers 3 was recently reported, but arose from deprotonation of a dimeric dimethyl dication: Keaton, R. J.; Jayaratne, K. C.; Fettinger, J. C.; Sita, L. R. J. Am. Chem. Soc. 2000, 122, 12909.
22. - occurs without prior dissociation. See ref 15.
23. Wang, Q.; Zhang, S.; Piers, W. E. Unpublished results.