Aktivierung von Kohlendioxid durch Metall(0)-Komplexe. Oxidative Kopplung von Kohlendioxid und Aldehyden am Zentralatom Nickel(0)

Activation of Carbon Dioxide by Metal(0) Complexes. Oxidative Coupling of Carbon Dioxide and Aldehydes on the Central Atom Nickel(0) The oxidative coupling of carbon dioxide and aliphatic aldehydes on the complex moiety 2,2′-Bipyridine-nickel(0) yields crystalline complexes, containing five-membered chelate rings with Nickel-C- and Nickel-O-σ-bonds (Nickela-2,4-dioxolane-3-one). IR, UV/VIS- and H-NMR-spectra are reported; the mechanism of the coupling reaction is discussed.