

Pharmaceutical organic salt: Disordered crystal structure of levofloxacin with γ-resorcylic acid
Syed Muddassir Ali Mashhadi (1,*)






(1) Department of Chemistry, University of Agriculture Faisalabad (Depalpur Okara Campus), Okara, 56130, Pakistan
(2) Department of Physics, University of Sargodha, Sargodha, 40100, Pakistan
(3) Department of Chemistry, Durham University, Stockton Road, Durham, DH1 3LE, United Kingdom
(4) Department of Chemistry, Allama Iqbal Open University, Islamabad, 44310, Pakistan
(5) Department of Physics, University of Sargodha, Sargodha, 40100, Pakistan
(6) Department of Chemistry, Allama Iqbal Open University, Islamabad, 44310, Pakistan
(*) Corresponding Author
Received: 06 Jul 2021 | Revised: 02 Aug 2021 | Accepted: 08 Aug 2021 | Published: 30 Sep 2021 | Issue Date: September 2021
Abstract
This study reports an organic salt prepared from an antibacterial drug, levofloxacin and antioxidant γ-resorcylic acid. A simple preparation method leads to a crystal with disordered structure. The idea is to prepare an organic salt comprising of pharmaceutically acceptable acidic and basic components. The salt is characterised by IR, solid state NMR, and single crystal XRD. Crystal data for C25H26N3O8F: triclinic, space group P-1 (no. 2), a = 7.0037(8) Å, b = 12.764(3) Å, c = 13.909(3) Å, α = 104.821(4)°, β = 92.039(4)°, γ = 95.334(4)°, V = 1194.6(4) Å3, Z = 2, T = 296(2) K, μ(MoKα) = 0.113 mm-1, Dcalc = 1.433 g/cm3, 16879 reflections measured (5.048° ≤ 2Θ ≤ 54.186°), 5139 unique (Rint = 0.0663, Rsigma = 0.0975) which were used in all calculations. The final R1 was 0.1121 (I>2σ(I)) and wR2 was 0.2505 (all data). SC-XRD analysis shows that the crystal packing is stabilized by strong H-bonding of type N-H···O and comparatively weak interactions of type C-H···O, C-H···π and off-set π···π stacking.
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DOI: 10.5155/eurjchem.12.3.323-328.2134
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DOI Link: https://doi.org/10.5155/eurjchem.12.3.323-328.2134

















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