Platinum Complexes Containing Pyramidalized Germanium and Tin Dihalide Ligands Bound through σ,σ M＝E Multiple Bonds.

We present the isolation of the first mononuclear dihalogermylene, and mono- and dinuclear stannylene complexes of transition metals. These exhibit exceptionally pyramidalized Group 14 centers. Additionally, removal of the halide substituents from the Ge/Sn atom was successfully performed in two ways, halide abstraction and reduction, leading to a variety of unusual structural motifs. [ABSTRACT FROM AUTHOR]