Synthesis, Characterization, and Non-Covalent Interactions of Palladium(II)-Amino Acid Complexes

The reaction of palladium(II) acetate with acyclic amino acids in acetone/water yields square planar bis-chelated palladium amino acid complexes that exhibit interesting non-covalent interactions. In all cases, complexes were examined by multiple spectroscopic techniques, especially HRMS (high resolution mass spectrometry), IR (infrared spectroscopy), and H-1 NMR (nuclear magnetic resonance) spectroscopy. In some cases, suitable crystals for single crystal X-ray diffraction were able to be grown and the molecular structure was obtained. The molecular geometries of the products are discussed. Except for the alanine complex, all complexes incorporate water molecules into the extended lattice and exhibit N-H center dot center dot center dot O and/or O center dot center dot center dot(HOH)center dot center dot center dot O hydrogen bonding interactions. The non-covalent interactions are discussed in terms of the extended lattice structures exhibited by the structures.

Automated summary

The reaction of palladium(II) acetate with acyclic amino acids in acetone/water produces square planar bis-chelated palladium amino acid complexes with interesting non-covalent interactions. The molecular structures of the products, including the incorporation of water molecules and N-H···O and/or O···(HOH)···O hydrogen bonding interactions, were discussed in terms of the extended lattice structures exhibited by the complexes. Multiple spectroscopic techniques were used for analysis, with some cases allowing for single crystal X-ray diffraction to obtain the molecular structure.