Tripalladium(0) sandwich complexes with nitrogen based ligands

The synthesis and characterization of a series of complexes based upon a central tripalladium ditropylium (Tr) unit [Pd3Tr2]2+ containing different nitrogen-based ligands is reported. The complexes were synthesized in good yield and characterized by multi-nuclei NMR spectroscopy, elemental microanalysis and single-crystal X-ray crystallography. Variation in the equatorial ligand strongly influences PdN bond distances, but has only a minor effect on PdPd distances.58