A new coordination Compound [Bi(L)(NO 3 ) 2 (ONO 2 )(CH 3 OH)] (1) [L: C 5 H 4 NCH=NNHCONC 5 H 4 ] has been synthesized by the reaction of Bismuth(III) bromide with the ligand pyridine-2-carbaldehyde isoniazid and characterized by elemental analysis, FT-IR spectroscopy and single-crystal X-ray diffraction. Single crystal X-ray diffraction reveals that the compound 1 is mononuclear complex, contains Bismuth(III) in a distorted tricapped trigonal prismatic geometry environment of NNO donors of Schiff base ligand, five oxygen atoms of Nitrate molecules and one oxygen atom of methanol molecule. We also synthesized a nano form of the compound 1 by the sonochemical method and characterized it by elemental analysis, scanning electron microscopy (SEM), X-ray powder diffraction (XRD) and IR spectroscopy. The d-Bi 2 O 3 nanoparticle was obtained by calcinations of the nano compound 1 at 500 8C under air atmosphere and was characterized by SEM and XRD.
A new mercury (II) coordination polymer {2[Hg(L)I 2 ](HgI 2 )}n (1) [L: (E)-N´-(1-(pyridine-3-yl)ethylidene) isonicotinohydrazide]was synthesized by the reaction of mercury(II) iodide with the ligand under thermal gradient conditions using the branch-tube method and fully characterized by infrared spectroscopy, 1 H NMR, elemental analysis and single crystal X-ray diffraction. The determination of the structure by single crystal X-ray crystallography shows that the compound in the solid state consists of two distinct 1D polymeric chains, which will be denoted parts A and B. The coordination numbers of Hg (II) are four, (HgI 4 ) of part A and (HgNI 3 ) of part B with square planar and tetrahedral geometry around the mercury (II) ions. The supramolecular features in these complexes are guided and controlled by weak directional intermolecular interactions. The chains interact with each other through π-π and CH-π stacking interactions creating a 3D framework. The structure of 1 was optimized by Density Functional Theory Calculations (DFT). Computed bond lengths and angles and vibrational frequencies are in good agreement with the experimental data.
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