This article describes the synthesis and characterization of the first silver complex with the germylene [GeB11H11](2-) and coinage metal complexes with the stannylene ligand [SnB11H11](2-). Starting materials like CuCl, AuCl(Me2S), and AgNO3 were used to give mononuclear (3 and 4), dinuclear (5), hexanuclear (6), and heptanuclear (7) coordination compounds: [Et4N](5)[Cu(CH3CN)(SnB11H11)(3)] (3), [Et4N](5)[Ag(SnB11H11)(3)] (4), [Et4N](6)[{Au(SnB11H11)(2)}(2)] (5), [Et4N](6) [{Ag(GeB11H11)}(6)] (6), and [Et4N](3)[Ag-7(SnB11H11)(8)] (7). In case of the oligonuclear compounds 5-7 silver and gold aggregation was observed under formation of metal metal bonds. Furthermore, the germa-closo-dodecaborate is found in a hitherto unknown mu(3)-bridging coordination mode connecting three silver atoms. The new compounds were characterized by single crystal X-ray diffraction and in the case of 3-6 also by NMR spectroscopy and elemental analysis.