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The asymmetric unit of the title complex [Cu(C14H12N2)2]2[Fe(CN)5(NO)], consists of a [Cu(dmp)2]+ cation (dmp is 2,9-dimethyl-1,10-phenanthroline) and half an [Fe(CN)5(NO)]2− anion. The anion is disordered across an inversion center with the FeII ion slightly offset (ca 0.205Å) from the inversion center in the direction of the disordered trans-coordinating CN/NO ligands. The anion has a distorted octa­hedral coordination geometry. The CuI ion is coordinated by two phenanthroline ligands in a distorted tetra­hedral geometry. The dihedral angle between the phenanthroline ligands is 77.16 (4) Å. In the crystal, the cations are connected to the anions by weak C—H...N hydrogen bonds. In addition, weak π–π stacking inter­actions are observed, with centroid–centroid distances in the range 3.512 (3)–3.859 (3) Å.
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