Article: Research from Liaocheng University yields new data on crystallography.

According to a study from Liaocheng, People's Republic of China, "The title complex, [Ni(C18H18N2O4)(H2O)], lies on a mirror plane with the Ni-II ion coordinated by two N and two O atoms of a tetradentate Schiff base ligand and one water O atom in a distorted square-pyramidal enviroment."

"The -CH2-CH2- group of the ligand is disordered equally over two sites about the mirror plane. The dihedral angle between the mean planes of the two symmetry-related chelate rings is 37.16 (6)degrees," wrote Z.H. Guo and colleagues, Liaocheng University.

The researchers concluded: "In the crystal structure, intermolecular O-H center dot center dot center dot O hydrogen ...

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