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Bis(methylidene) Complex of Tantalum Supported by a PNP Ligand
Journal article   Peer reviewed

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

Laura C. H Gerber, Lori A Watson, Sean Parkin, Wei Weng, Bruce M Foxman and Oleg V Ozerov
Organometallics, Vol.26(20), pp.4866-4868
09/01/2007

Abstract

Chemical structure Carbene compounds Hydrogen Metals Ligands
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.

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