Bis(benzimidazole)amine vanadium catalysts for olefin polymerisation and co-polymerisation: Thermally robust, single-site catalysts activated by simple alkylaluminium reagents

Chemical Communications

Volumn , Issue 17, 2004, Pages 1956-1957

  Tomov, Atanas K ^a   Gibson, Vernon C ^a   Zaher, Damien ^a   Elsegood, Mark R J ^b   Dale, Sophie H ^b  

^a IMPERIAL COLLEGE LONDON   (United Kingdom)

^b LOUGHBOROUGH UNIVERSITY   (United Kingdom)

Author keywords

[No Author keywords available]

Indexed keywords

ALKENE; ALUMINUM DERIVATIVE; BENZIMIDAZOLE DERIVATIVE; BIS(BENZIMIDAZOLE)AMINE; METHYLALUMOXANE; UNCLASSIFIED DRUG; VANADIUM DERIVATIVE;

ARTICLE; CATALYST; CHEMICAL STRUCTURE; NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY; POLYMERIZATION; SYNTHESIS; THERMOSTABILITY;

EID: 5044240450     PISSN: 13597345     EISSN: None     Source Type: Journal    
DOI: 10.1039/b407065h     Document Type: Article

References (16)

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9. Fluoro-aryl borates (see W. E. Piers and T. Chivers, Chem. Soc. Rev., 1997, 26, 345) and related aluminium reagents (Y.-X. Chen, C. L. Stern and T. J Marks, J. Am. Chem. Soc., 1997, 119, 2582) and halogenated carboranyl anions (see C. A. Reed, Acc. Chem. Res., 1998, 31, 133) can also be employed for this purpose but, in general, MAO provides a convenient method of activation with the added advantage of acting as an efficient poison scavenger.
10. Fluoro-aryl borates (see W. E. Piers and T. Chivers, Chem. Soc. Rev., 1997, 26, 345) and related aluminium reagents (Y.-X. Chen, C. L. Stern and T. J Marks, J. Am. Chem. Soc., 1997, 119, 2582) and halogenated carboranyl anions (see C. A. Reed, Acc. Chem. Res., 1998, 31, 133) can also be employed for this purpose but, in general, MAO provides a convenient method of activation with the added advantage of acting as an efficient poison scavenger.
11. Fluoro-aryl borates (see W. E. Piers and T. Chivers, Chem. Soc. Rev., 1997, 26, 345) and related aluminium reagents (Y.-X. Chen, C. L. Stern and T. J Marks, J. Am. Chem. Soc., 1997, 119, 2582) and halogenated carboranyl anions (see C. A. Reed, Acc. Chem. Res., 1998, 31, 133) can also be employed for this purpose but, in general, MAO provides a convenient method of activation with the added advantage of acting as an efficient poison scavenger.
12. y. In the absence of the support, activity falls sharply at elevated temperature (Y. Nakayama, H. Bando, Y. Sonobe, Y. Suzuki and T. Fujita, Chem. Lett., 2003, 32, 766).
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15. A chlorinated promoter is usually employed in vanadium systems due to the propensity for reduction of the vanadium hydride species generated upon chain transfer (see also ref. 12).
16. H. Hagen, J. Boersma and G. van Koten, Chem. Soc. Rev., 2002, 31, 357.