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Synthesis, characterization, and crystal structure of a copper(II) complex with quinolone family member (ciprofloxacin): bis(1)-cyclopropyl-6-fluoro-1,4-dihydro-4-oxo-7-piperazin-1ylquinoline-3-carboxylate) copper(II) chloride hexahydrate

1994; Elsevier BV; Volume: 56; Issue: 4 Linguagem: Inglês

10.1016/0162-0134(94)85107-7

1873-3344

Iztok Turel, I. Leban, Nataša Bukovec,

Crystal structures of chemical compounds

The synthesis of the coordination compound [Cu(CF)2]Cl2.6H2O is reported. Its crystal structure is presented and discussed. The title compound crystallizes in the triclinic space group P1 with a = 9.369(2), b = 9.573(2), c = 11.206(2) Å, α = 87.37(2), β = 80.58(2), γ = 86.25(2)°, Z = 988.8 Å3 Z = 1, and Dc = 1.520 gcm−3. A structure détermination, using three-dimensional MoKα x-ray data, resulted in conventional R and Rw values of 0.0399 and 0.0988, respectively, for 3495 unique reflexions for which I > 2σ(I). Refinement was based on F2. The copper atom at the center of inversion is surrounded in a plane by four oxygens (two of the carboxylate groups, two of the carbonyl groups), the corresponding CuO distances are 1.928(2) and 1.931(2) Å, respectively. The two chlorine atoms are axially coordinated to Cu at larger distances than 2.688(2) Å. The Cl atoms appeared to be disordered over three positions. The nearly planar moieties of Cu(CF)2 are packed parallel in the unit cell interconnected via hydrogen bonds of the type NH⋯O, OH⋯Cl and OH⋯O. The results of other physical measurements (TG, FT-IR, and various analyses) are also included.