Three novel isostructural complexes M（gatx）2（H2O）2·4H2O [gatx=gatifloxacin, M = Zn （1）, Ni （2） and Co （3）] were synthesized at room temperature and structurally characterized by elemental analysis, IR and single crystal X-ray diffraction, which exhibit a similar mononuclear structure, in which the metal ion is coordinated by two gatifloxacin and two aqua ligands to furnish a distorted octahedral geometry, and show different activities against staphylococcus due to the different metal ions in the structures.
The single crystal of bi（8-hydroxyquinoline） bihydrated cobalt （Ⅱ） complex, [ Co（Q）2 （H2O2 ] （Q = 8-hydroxyquinoline ion）, has been synthesized by general method and structurally characterized by single crystal X-ray diffraction. Crystal data： C18H16CoN2O4, monoclinic, C2/c, α = 1.336 2（4） nm, b = 0.941 2（3） nm, c = 1.354 3（4） nm, β= 109.672（4）°, Z = 4. In the complex, Co（ Ⅱ ） ion is six-coordinated, forming a distorted octahedron. H-bonding and π-π stacking interaction play a significant role to form and stabilize the three-dimensional structure.
A novel flower-like hydrated magnesium carbonate hydroxide, Mg5 （CO3 ）4 （OH）2·4H2O, with micro-structure composed of individual thin nano-sheets was synthesized using a facile solution route without the use of template or organic surfactant. Reaction time has an important effect on the final morphology of the product. The micro-structure and morphology of Mg5 （CO3）4 （OH）2·4H2O were characterized by means of X-ray diffractometry （XRD）, fieldemission scanning electron microscopy（FE-SEM）. Brunauer-Emmett-Teller（BET） surface areas of the samples were also measured. The probable formation mechanism of flower-like micro-structure was discussed. It was found that Mg5 （CO3）4（ OH）2·4H2O with flower-like micro-structure was a novel and efficient catalyst for the synthesis of diphenyl carbonate （DPC） by transesterification of dimethyl carbonate （DMC） with phenol.
WANG QiangWANG Ke-liWU Xing-longLUO Sheng-junHU Chang-wen
The title compound [Cu(Phen)3](ClO4)2(btio)(H2O), where btio = 2-(4- benzoyloxyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide, has been prepared and structurally characterized by X-ray diffraction. It crystallizes in triclinic, space group P?with a = 13.049(4), b = 13.827(5), c = 14.860(5) , a = 71.736(6), b = 77.076(6), g = 87.054(6)? C50H43Cl2CuN8O13, Mr = 1098.36, V = 2481(1) 3, Z = 2, Dc = 1.470 g/cm3, m(MoKa) = 0.622 mm-1, F(000) = 1132, the final R = 0.0639 and wR = 0.1473 for 8705 independent reflections with Rint =0.0285. The title compound is composed of [Cu(Phen)3]2+ moiety , one btio, two perchlorate ions and one water molecule. The copper(II) ion is octahedrally coordinated by three 1,10-phenanthroline ligands. The outer sphere consisting of one btio, two perchlorate ions and one water molecule is combined with the inner by hydrogen bonds and electrostatic interactions.
