The title compound, [Fe(C₂N₃)₂(C₈H₇N₅)₂]·2H₂O, has been synthesized solvothermally and characterized by single-crystal X-ray diffraction. The octahedral iron coordination polyhedron contains two di(pyrimidin-2-yl)amine ligands coordinated in a bidentate fashion, and two monodentate dicyanimido ligands, each coordinated via a terminal N atom, with the latter in a cis orientation. The ligand configuration about the iron atom is chiral, although the compound crystallizes as a racemic mixture: the Fe—N distances (> 2.07 Å) are characteristic of high-spin iron(II). In the crystal, an extensive series of N—H...N, O—H...N and O—H...O hydrogen bonds links the independent molecular components into a three-dimensional framework. The H atoms of both water molecules are disordered. The structure also features some π–π and anion–π interactions. The intermolecular interactions were investigated by Hirshfeld surface analysis and two-dimensional fingerprint plots. Comparisons are made with some related compounds.

The title compound, [Cu(C₉H₅N₄O)₂(C₁₀H₉N₃)₂], was synthesized solvothermally. The complex exhibits a distorted octahedral coordination geometry. The Cu^II atom is located on an inversion centre. The distorted octahedral CuN₆ coordination sphere is composed of bidentate 2,2′-dipyridylamine in the equatorial sites while the axial sites are occupied by 1,1,3,3-tetracyano-2-ethoxypropenide ligands. In the crystal, N—H...N hydrogen bonding results in chains parallel to [010].