Mapping Palladium Reduction by Carbon Monoxide in a Catalytically Relevant System. A Novel Palladium(I) Dimer

详细信息    查看全文

• 作者：Fabio Ragaini ; Heros Larici ; Martino Rimoldi ; Alessandro Caselli ; Francesco Ferretti ; Piero Macchi ; Nicola Casati
• 刊名：Organometallics
• 出版年：2011
• 出版时间：April 25, 2011
• 年：2011
• 卷：30
• 期：8
• 页码：2385-2393
• 全文大小：885K
• 年卷期：v.30,no.8(April 25, 2011)
• ISSN：1520-6041

文摘

Reaction of neutral palladium(II) complexes with chelating nitrogen ligands of the phenanthroline family had been earlier found to proceed through the formation of a CO adduct, which is then reduced to another observable complex before decomposing to metallic palladium. We have now extended this study and completely characterized by single-crystal X-ray diffraction one member of this class of compounds. The intermediate is an unprecedented type of palladium(I) dimer with two bridging COs. The same complex could also be obtained by a conproportionation reaction of a Pd⁰ with a Pd^II complex. The picture of the reactivity of neutral palladium(II) complexes with phenanthroline ligands in a CO atmosphere was completed by the identification of two byproducts of the main reaction.