Bis(methylidene) Complex of Tantalum Supported by a PNP Ligand

Bis(methylidene) Complex of Tantalum Supported by a PNP Ligand

Reaction of (PNP)Li with TaF5 produces pentagonal-bipyramidal (PNP)TaF4 (2). Alkylation of 2 with MeMgBr allows for the isolation of (PNP)TaMe4 (3). (PNP)TaMe4 (3) evolves thermally and/or photochemically into a bis(methylidene) complex (PNP)Ta(CH2)2 (4). The identity of the latter has been establi...

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Veröffentlicht in:Organometallics 2007-09, Vol.26 (20), p.4866-4868
Hauptverfasser: Gerber, Laura C. H, Watson, Lori A, Parkin, Sean, Weng, Wei, Foxman, Bruce M, Ozerov, Oleg V
Format: Artikel
Sprache:eng
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Zusammenfassung:Reaction of (PNP)Li with TaF5 produces pentagonal-bipyramidal (PNP)TaF4 (2). Alkylation of 2 with MeMgBr allows for the isolation of (PNP)TaMe4 (3). (PNP)TaMe4 (3) evolves thermally and/or photochemically into a bis(methylidene) complex (PNP)Ta(CH2)2 (4). The identity of the latter has been established by X-ray structural, NMR spectroscopic, and DFT computational studies. It does not appear that 4 possesses agostic interactions in solution.
ISSN:0276-7333
1520-6041
DOI:10.1021/om700715s