Crystal structures and spectroscopic properties of palladium complexes isolated from Pd-EDTA solutions

Two complexes were isolated as single crystals from aqueous Pd(NO3)2-Na2H2EDTA solutions. These complexes, Pd(Hkpda)2 and [Pd(μ-H2EDTA)]2 · 2NaNO3 · 7.5H2O, were characterized by single crystal X-ray diffraction, IR/Raman spectroscopy, and photoelectron spectroscopy. In both complexes, the palladium atoms were shown to adopt a planar trans-geometry by bonding to two nitrogen and two oxygen atoms of two ligand molecules.