Germylenes and Stannylenes with Chelating Anilido-Imine Ligands: Syntheses, Structures and Reactivity

Germylenes and stannylenes with anilido-imine ligands were synthesized in high yields by the reaction of group 14 dichlorides (Cl2Ge center dot dioxane, Cl2Sn) and the lithium salts of the ligands. Complexes were characterized by H-1 and C-13 NMR spectroscopy, and the molecular structure of methoxygermylene was determined by X-ray crystallography. These data indicate the formation of N,N'-chelate complexes having three-coordinate germanium or tin atoms and quasiplanar six-membered heterocycles. In the germanium series, cycloaddition reactions with o-quinone were performed, and the structures of the cycloadducts were determined by X-ray structure analyses. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)