The structure consists of slightly distorted octahedrally coordinated complexes of two glycine residues and two water molecules about the nickel atoms. These complexes are held to each other by strong oxygen-to-oxygen hydrogen bonds and by both strong and weak nitrogen-tooxygen hydrogen bonds.Because of the unfortunate orientation of the molecule with respect to the axes of the crystal, some of the parameters were not evaluated from projections but were in part calculated from assumed interatomic distances.The structure of the glycine residues is substantially the same as that found by Corey and Albrecht1 for glycine.
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