Ansa-zirconocenes based on N-substituted 2-methylcyclopenta[b]indoles: Synthesis and catalyst evaluation in liquid propylene polymerization
Jan F Van Baar
1
,
Andrew D Horton
1
,
Kees P de Kloe
1
,
Eric Kragtwijk
1
,
Shaen G Mkoyan
1
,
Peter A Schut
1
,
Ilya V. Taydakov
1
,
Ilya V Taidakov
1
Publication type: Journal Article
Publication date: 2003-05-29
scimago Q2
wos Q1
SJR: 0.676
CiteScore: 5.1
Impact factor: 2.9
ISSN: 02767333, 15206041
Organic Chemistry
Inorganic Chemistry
Physical and Theoretical Chemistry
Abstract
Cyclopenta[b]indole-based ansa-zirconocenes were prepared and studied as catalysts for propylene polymerization. Substituted 2-methyl-4-R-1,4-dihydrocyclopenta[b]indoles (R = Ph, 7a; R = o-Tol, 7b; R = Me, 7c) were synthesized and converted into the racemic forms of the corresponding ansa-zirconocenes Me2Si(2-Me-4-R-cyclopenta[b]indolyl)2ZrCl2 (R = Ph, 10a; R = o-Tol, 10b; R = Me, 10c). The structure of 10a was determined by X-ray analysis. The effectiveness in polymerization catalysis of the metallocenes compared to benchmark metallocenes rac-Me2Si(2-Me-4-Ph-Ind)2ZrCl2 (11) and rac-Me2Si(2-Me-4,5-BzInd)2ZrCl2 (12) was investigated in liquid propylene at 70 °C. Both 10a and 10b with MAO cocatalyst afforded highly isospecific (mmmm 95.9, 95.6%, respectively) and highly regisospecific polypropylene (0.17, 0.34% imbedded regioerrors), which exhibited a high melting point (Tm2 = 154.2, 156.3 °C). The polymer properties were intermediate between those of 11 and 12, with the molecular weight, stereospecificity,...
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Van Baar J. F. et al. Ansa-zirconocenes based on N-substituted 2-methylcyclopenta[b]indoles: Synthesis and catalyst evaluation in liquid propylene polymerization // Organometallics. 2003. Vol. 22. No. 13. pp. 2711-2722.
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Van Baar J. F., Horton A. D., de Kloe K. P., Kragtwijk E., Mkoyan S. G., Nifant'ev I. E., Schut P. A., Taydakov I. V., Taidakov I. V. Ansa-zirconocenes based on N-substituted 2-methylcyclopenta[b]indoles: Synthesis and catalyst evaluation in liquid propylene polymerization // Organometallics. 2003. Vol. 22. No. 13. pp. 2711-2722.
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TY - JOUR
DO - 10.1021/om020505t
UR - https://pubs.acs.org/doi/10.1021/om020505t
TI - Ansa-zirconocenes based on N-substituted 2-methylcyclopenta[b]indoles: Synthesis and catalyst evaluation in liquid propylene polymerization
T2 - Organometallics
AU - Van Baar, Jan F
AU - Horton, Andrew D
AU - de Kloe, Kees P
AU - Kragtwijk, Eric
AU - Mkoyan, Shaen G
AU - Nifant'ev, Ilya E.
AU - Schut, Peter A
AU - Taydakov, Ilya V.
AU - Taidakov, Ilya V
PY - 2003
DA - 2003/05/29
PB - American Chemical Society (ACS)
SP - 2711-2722
IS - 13
VL - 22
SN - 0276-7333
SN - 1520-6041
ER -
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@article{2003_Van Baar,
author = {Jan F Van Baar and Andrew D Horton and Kees P de Kloe and Eric Kragtwijk and Shaen G Mkoyan and Ilya E. Nifant'ev and Peter A Schut and Ilya V. Taydakov and Ilya V Taidakov},
title = {Ansa-zirconocenes based on N-substituted 2-methylcyclopenta[b]indoles: Synthesis and catalyst evaluation in liquid propylene polymerization},
journal = {Organometallics},
year = {2003},
volume = {22},
publisher = {American Chemical Society (ACS)},
month = {may},
url = {https://pubs.acs.org/doi/10.1021/om020505t},
number = {13},
pages = {2711--2722},
doi = {10.1021/om020505t}
}
Cite this
MLA
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Van Baar, Jan F., et al. “Ansa-zirconocenes based on N-substituted 2-methylcyclopenta[b]indoles: Synthesis and catalyst evaluation in liquid propylene polymerization.” Organometallics, vol. 22, no. 13, May. 2003, pp. 2711-2722. https://pubs.acs.org/doi/10.1021/om020505t.