New trimetallic sandwich complexes of platinum(0) and palladium(0)

The synthesis and characterization of a series of complexes based upon a central triplatinum ditropylium (Tr) unit [Pt 3 Tr 2 ] 2+ containing different halide ligands is reported. The complexes were synthesized in moderate yield and characterized by multi-nuclei NMR spectroscopy, mass spectrometry, microanalysis and X-ray crystallography. In addition it was demonstrated that mixed-metal, palladium–platinum sandwich complexes could also be formed [Pd n Pt 3-n Tr 2 X 3 ][ Y ] ( X = Cl, Br and I, Y = NBu 4 + or PBu 4 + ).