| Summary: | The title complex, [Ni(C12H8N2)2(H2O)2][Ni(CN)4]·C4H8O·H2O, consists of a cationic [Ni(C12H8N2)2(H2O)2]2+ unit, an anionic [Ni(CN)4]2− unit, one uncoordinated water and one tetrahydrofuran molecule. In the cationic unit, the Ni2+ atom is coordinated by four N atoms and two O atoms from two 1,10-phenanthroline ligands and two water molecules in a distorted octahedral coordination environment. In the anionic unit, the Ni2+ atom is in a square-planar coordination by four C atoms from four monodentate terminal cyanide ligands. O—H...N and O—H...O hydrogen bonds link neighboring cationic and anionic units, forming a three-dimensional supramolecular network. The interstitial tetrahydrofuran molecule is independently disordered over two sites in a 1:1 ratio.
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