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

详细信息    查看全文

• 作者：Laura C. H. Gerber ; Lori A. Watson ; Sean Parkin ; Wei Weng ; Bruce M. Foxman ; Oleg V. Ozerov
• 刊名：Organometallics
• 出版年：2007
• 出版时间：September 24, 2007
• 年：2007
• 卷：26
• 期：20
• 页码：4866 - 4868
• 全文大小：99K
• 年卷期：v.26,no.20(September 24, 2007)
• ISSN：1520-6041

文摘

Reaction of (PNP)Li with TaF₅ produces pentagonal-bipyramidal (PNP)TaF₄ (2). Alkylation of 2 with MeMgBrallows 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 latterhas been established by X-ray structural, NMR spectroscopic,and DFT computational studies. It does not appear that 4possesses agostic interactions in solution.