Reactions of 1-Titana- and 1-Zirconacyclopent-3-ynes with Tris(pentafluorophenyl)borane
The 1-metallacyclopent-3-ynes Cp2Ti(η4-H2C4H2) (1) (Cp = η5-cyclopentadienyl) and rac-(ebthi)Zr(η4-H2C4H2) (2) (ebthi = 1,2-ethylene-1,1‘-bis(η5-tetrahydroindenyl) react with B(C6F5)3 under ring opening of the metallacycle and formation of the zwitterionic complexes [Cp2Ti]+−CH2C⋮CCH2−[B-(C6F5)3] (3...
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Published in | Organometallics Vol. 24; no. 24; pp. 5916 - 5918 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
WASHINGTON
American Chemical Society
21.11.2005
Amer Chemical Soc |
Subjects | |
Online Access | Get full text |
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Summary: | The 1-metallacyclopent-3-ynes Cp2Ti(η4-H2C4H2) (1) (Cp = η5-cyclopentadienyl) and rac-(ebthi)Zr(η4-H2C4H2) (2) (ebthi = 1,2-ethylene-1,1‘-bis(η5-tetrahydroindenyl) react with B(C6F5)3 under ring opening of the metallacycle and formation of the zwitterionic complexes [Cp2Ti]+−CH2C⋮CCH2−[B-(C6F5)3] (3) and [rac-(ebthi)Zr]+−CH2C⋮CCH2−[B-(C6F5)3] (4). Crystal structures of 3 and 4 show a but-2-yne-1,4-diyl ligand bridging the metallocenium center and the formed boranate. Complex 4 is an active catalyst for ethylene polymerization. |
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Bibliography: | In memory of Dr. habil Erhard Kurras, deceased June 10th, 2005. istex:F7B1FA83DC6A0C3B77069CEEC8951E352B2C80B6 ark:/67375/TPS-HLG974XM-9 |
ISSN: | 0276-7333 1520-6041 |
DOI: | 10.1021/om0507880 |