Dihapto-Coordinated Amide, Ester, and Aldehyde Complexes and Their Role in Decarbonylation

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• 作者：Peter M. Graham ; Christopher J. Mocella ; Michal Sabat ; and W. Dean Harman
• 刊名：Organometallics
• 出版年：2005
• 出版时间：February 28, 2005
• 年：2005
• 卷：24
• 期：5
• 页码：911 - 919
• 全文大小：275K
• 年卷期：v.24,no.5(February 28, 2005)
• ISSN：1520-6041

文摘

The -basic metal fragment {TpW(NO)(PMe₃)} forms thermally stable ² complexes withacetaldehyde, acetone, ethyl acetate, methyl formate, and N,N-dimethylformamide (whereTp = hydridotris(pyrazolyl)borate). The related system {TpMo(NO)(MeIm)} (MeIm =1-methylimidazole) also forms stable ² complexes with acetone, methyl formate, and N,N-dimethylformamide. When the tungsten fragment is combined with a carboxylic acid,oxidative addition yields a seven-coordinate hydride complex. These results are comparedto those observed for analogous Re and Os systems. TpMo(NO)(MeIm)(²-DMF) and TpW(NO)(PMe₃)(²-DMF) are rare examples of ² amide complexes, demonstrating the exceptionalstrength of these group 6 bases.