名称:
New Cyclodiphosph(V)azane Complexes of Fe(III), Co(II), Ni(II), Cu(II), Zn(II), and UO2 (II): Preparation, Characterization, and Biological Activity Studies
摘要:
Hexachlorocyclodiphosph(V)(azane of salfamethoxazole, H2L, reacts with stoichiometric amounts of transition metal salts such as Fe(III), Co(II), Ni(II), Cu(II), Zn(II), and UO2(II) to afford coloured complexes in a moderate to high yield. The structare of the isolated complexes was suggested based oil elemental analyses, IR, molar conductance, UV-Vis, H-1 NMR, mass spectra, solid reflectance, magnetic susceptibility measurements, and thermogravimetric analysis (TGA). Front the elemental analyses data, 1:29 (H2L:M) ratio is suggested and the complexes are found to hat)e the general formula [(MXn)(2)(H2L)(H2O)(m)] where M = Fe(III) (X = Cl, n = 3, m = 2), Co(II) (X = Cl, n = 2, m = 4), Ni(II) (X = Cl, n = 2, m = 4), Cu(II) (X =Cl, n = 2, m = 4), Zn(II) (X Cl, n = 2, m = 4), and UO2(II) (X = NO3, n = 2, m = 0). The IR and H-1 NMR spectral data revealed that H2L behaves as a neutral bidentate ligand coordinated to the metal ions through enolic sulfonamide OH and isoxazole N atoms. The UV-Vis, solid reflectance, and magnetic-moment data have shown that the ligands are coordinated to the metal ions in all octahedral manner: The molar conductance data show, that the complexes are nonelectrolytes. The thermal data reveal that the coordinated it)(iter and anion molecules are lost in the first two steps while the ligand molecules are lost in the subsequent steps, leaving metal oxide residues. Different thermodynamic activation parameters are calculated using the Coats-Redfern equation. The prepared complexes showed high to moderate bactericidal activity compared with the ligand.