Synthesis and crystal structure of bis(levofloxacindiium) diaquatetra-μ-chlorido-pentachloridotricopper(II) chloride
Аннотация
The title compound, (C 18 H 22 FN 3 O 4 ) 2 [Cu 3 Cl 9 (H 2 O) 2 ]Cl, has been synthesized in the presence of levofloxacin, which acts as an organic component in the formation of the cationic species The asymmetric unit comprises one levofloxacin dication, one half of a trinuclear [Cu 3 Cl 9 (H 2 O) 2 ] 3− anion and one half of an outer-sphere chloride anion. The central Cu II atom, an apically coordinated chlorido ligand and the free chloride anion all reside on crystallographic twofold rotation axes, resulting in a unique symmetry-imposed configuration. Each Cu II atom exhibits a five-coordinated distorted square-pyramidal coordination environment. The structure displays a pronounced Jahn–Teller distortion, evidenced by short basal Cu—Cl/O bonds ranging from 1.992 (4) to 2.3714 (12) Å and significantly elongated apical Cu—Cl interactions between 2.6547 (13) and 2.681 (2) Å. The crystal packing is stabilized by an extensive hydrogen-bonding network, with Cl and O atoms acting as acceptors for O—H...Cl, O—H...O, N—H...Cl and C—H...O interactions. These contacts link the cationic, anionic and neutral units into a robust tri-periodic supramolecular architecture.