Stirring Lewis-basic transition metal complexes with the salts M[BArCl4] (M = Ag, Tl; ArCl = 3,5-C6H3Cl2) resulted in the formation of diplatinum complexes [{(Cy3P)2Pt}2(μ-Ag)][BArCl4] (3) and [{(Cy3P)2Pt}2(μ-Tl)][BArCl4] (4) and the diiron compound [{(OC)3(Me3P)2Fe}2(μ-Ag)] (5) featuring bridging, unsupported metal cations. Their properties were investigated by multinuclear NMR spectroscopy, as well as X-ray diffraction and infrared measurements.
