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In the title complex, [Cu(NO3)2(C17H18FN3O3)2], the CuII ion is located on an inversion center. It exhibits a distorted octa­hedral geometry, being coordinated by six O atoms, four from two ciprofloxacin ligand mol­ecules (L), which act as bidentate ligands, and two from two nitrate anions. In the ligand, the piperazine ring has a chair conformation and the quinoline system is essentially planar [maximum deviation = 0.097 (2) Å]. One of the nitrate O atoms is disordered over two positions [occupancy ratio = 0.51 (6):0.49 (6)]. There is a C—H...F inter­action in the complex. In the crystal, mol­ecules are linked via N—H...O hydrogen bonds generating a two-dimensional network lying parallel to (111). The presence of C—H...O inter­actions leads to the formation of a three-dimensional structure. The title complex was prepared by hydro­thermal synthesis, and the hexa­hydrate form of this complex, synthesized by conventional methods, has been reported previously [Hernandez-Gil et al. (2009). Polyhedron, 28, 138–144].

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In the title compound, [Mn(C10H7N6)2(H2O)4]·2H2O, the complex unit comprises an Mn2+ ion, coordinated by two imidazole N atoms from cis-related monodentate 5-[4-(imidazol-1-yl)phen­yl]tetra­zolide ligands and four water mol­ecules, together with two water mol­ecules of solvation. The Mn2+ ion lies on a twofold rotation axis and has a slightly distorted octa­hedral geometry. The mol­ecules are connected by O—H...N and O—H...O hydrogen bonds involving both coordinated and solvent water mol­ecules, generating a three-dimensional structure. Two C atoms of the imidazole ring of the ligand are each disordered over two sites with occupancy factors of 0.75 and 0.25.
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