Bis(methylidene) Complex of Tantalum Supported by a PNP Ligand
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Reaction of (PNP)Li with TaF5 produces pentagonalbipyramidal (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. 2007 American Chemical Society.
author list (cited authors)
Gerber, L., Watson, L. A., Parkin, S., Weng, W., Foxman, B. M., & Ozerov, O. V.
complete list of authors
Gerber, Laura CH||Watson, Lori A||Parkin, Sean||Weng, Wei||Foxman, Bruce M||Ozerov, Oleg V