Bis[1-cyclo-propyl-6-fluoro-4-oxo-7-(1-piperazin-4-ium-1-yl)-1,4-dihydro-quinoline-3-carboxyl-ate-κO,O]bis-(nitrato-κO)copper(II).

In the title complex, [Cu(NO(3))(2)(C(17)H(18)FN(3)O(3))(2)], the Cu(II) ion is located on an inversion center. It exhibits a distorted octa-hedral geometry, being coordinated by six O atoms, four from two ciprofloxacin ligand mol-ecules (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 inter-action in the complex. In the crystal, mol-ecules are linked via N-H⋯O hydrogen bonds generating a two-dimensional network lying parallel to (111). The presence of C-H⋯O inter-actions leads to the formation of a three-dimensional structure. The title complex was prepared by hydro-thermal synthesis, and the hexa-hydrate form of this complex, synthesized by conventional methods, has been reported previously [Hernandez-Gil et al. (2009 ▶). Polyhedron, 28, 138-144].