Catalyst/cocatalyst nuclearity effects in single-site olefin polymerization. Significantly enhanced 1-octene and isobutene comonomer enchainment in ethylene polymerizations mediated by binuclear catalysts and cocatalysts

Journal of the American Chemical Society

Volumn 125, Issue 36, 2003, Pages 10788-10789

  Li, Hongbo ^a   Li, Liting ^a   Marks, Tobin J ^a   Liable Sands, Louise ^b   Rheingold, Arnold L ^b  

^a NORTHWESTERN UNIVERSITY   (United States)

^b UNIVERSITY OF DELAWARE   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ALKENE DERIVATIVE; COPOLYMER; ETHYLENE DERIVATIVE; POLYETHYLENE DERIVATIVE;

ARTICLE; CATALYST; CHEMICAL STRUCTURE; MOLECULAR WEIGHT; POLYMERIZATION; REACTION ANALYSIS; SPECTROPHOTOMETRY; STRUCTURE ANALYSIS;

EID: 0042233981     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja036289c     Document Type: Article

References (31)

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7. For recent reviews of single-site olefin polymerization, see: (a) Gibson, V. C.; Spitzmesser, S. K. Chem. Rev. 2003, 103, 283-316. (b) Gladysz, J. A., Ed. Chem. Rev. 2000. 100 (special issue on "Frontiers in Metal-Catalyzed Polymerization"). (c) Marks, T. J., Stevens, J. C., Eds. Topics Catal. 1999, 15, and references therein.
8. For recent reviews of single-site olefin polymerization, see: (a) Gibson, V. C.; Spitzmesser, S. K. Chem. Rev. 2003, 103, 283-316. (b) Gladysz, J. A., Ed. Chem. Rev. 2000. 100 (special issue on "Frontiers in Metal-Catalyzed Polymerization"). (c) Marks, T. J., Stevens, J. C., Eds. Topics Catal. 1999, 15, and references therein.
9. For studies of binuclear metallocenes, see: (a) Abramo, G. P.; Li, L.; Marks, T. J. J. Am. Chem. Soc. 2002, 124, 13966-13967. (b) Li, L.; Metz, M. V.; Li, H.; Chen, M.-C.; Marks, T. J.; Liable-Sands, L.; Rheingold, A. L. J. Am. Chem. Soc. 2002, 124, 12725-12741. (c) Spaleck, W.; Kuber, F.; Bachmann, B.; Fritze, C.; Winter, A. J. Mol. Catal. A: Chem. 1998, 128, 279-287.
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18. See Supporting Information for details.
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26. 3 does not initiate cationic isobutene polymerization in toluene,11c and the present copolymerizations with ethylene are inconsistent with a cationic pathway.11b,c
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31. 2, doubtless a consequence of the closer Zr-Zr spatial proximity (Li, H.; Li, L.; Marks, T. J., unpublished observations),