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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Veröffentlicht in:	Organometallics 2005-11, Vol.24 (24), p.5916-5918
Hauptverfasser:	Bach, Marc A, Beweries, Torsten, Burlakov, Vladimir V, Arndt, Perdita, Baumann, Wolfgang, Spannenberg, Anke, Rosenthal, Uwe, Bonrath, Werner
Format:	Artikel
Sprache:	eng
Online-Zugang:	Volltext
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Zusammenfassung:	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.
ISSN:	0276-7333 1520-6041
DOI:	10.1021/om0507880