Transmetallation of alkynyl and aryl complexes of Group 10 transition metals

✍ Scribed by Kohtaro Osakada; Takakazu Yamamoto

• Book ID: 104112042
• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 298 KB
• Volume: 198
• Category: Article
• ISSN: 0010-8545
• DOI: 10.1016/s0010-8545(99)00210-6

✦ Synopsis

This article reviews recent studies on intermolecular transfer of alkynyl and aryl ligands of Ni, Pd, and Pt complexes. The reactions of aryl and alkynyl groups bonded to the Group 10 metal complexes are of significant importance relevant to the mechanism of synthetic organic reactions catalyzed by complexes of these metals. The reaction of alkynylcopper PPh 3 complexes with dichloropalladium complexes leads to formation of mono-and dialkynylpalladium complexes via transmetallation. Aryl(iodo)palladium complexes react with the alkynylcopper complexes to result in rapid and reversible transfer of the alkynyl ligand between Cu(I) and Pd(II) compounds. Aryl(phenylethynyl)palladium complexes with PEt 3 ligands react with aryl(iodo)-palladium and platinum complexes to afford aryl(phenylethynyl)platinum complex. An associative pathway for the reaction is proposed based on the kinetic results. The intermolecular transfer of the alkynyl ligand from Pd(II) to Pt(II) complexes is significantly enhanced by addition of CuI. Aryl ligand transfer of