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    Öğe
    Synthesis of Hofmann-type Zn(H2O)2 Ni(CN)4•nG (G = water and 1,4-dioxane) clathrates and the determination of their structural properties by various spectroscopic methods
    (Tubitak Scientific & Technological Research Council Turkey, 2019) Kartal, Zeki; Sahin, Onur; Yavuz, Abdulkerim
    Two new 2-dimensional cyanide-bridged coordination polymers [Zn(H2O)(2)Ni(CN)(4) 6(H2O) and Zn(H2O)(2) Ni(CN)(4) 3(C4H8O2)], which were similar to Hofmann-type clathrates, were synthesized based on [Ni(CN)(4)](2-) and Zn2+ as building blocks. These substances were synthesized as compounds in crystalline form. Thes tructures of the crystalline compounds were characterized via their spectral analyses. General information about the structures of the newly obtained Hofmann-type clathrates was obtained from their vibration spectra by considering significant changes in the vibration peaks of the cyanide group, water ligand molecule, and guest molecules (water and 1,4-dioxane). The thermal behavior of the Hofmann-type clathrates was investigated in the range of 25-500 degrees C. In addition, experimental data on the magnetic properties of the Hofmann-type clathrates were obtained using the Gouy method under normal conditions. Information on the properties of the structures of the Hofmann clathrates was obtained by applying the single crystal diffraction technique. The asymmetric unit of the first Hofmann-type clathrate contained 1 Zn(II) ion, 1 Ni(II) ion, 1 cyanide ligand, 1 water ligand molecule, and 2 guest water molecules. The asymmetric unit of the second Hofmann-type clathrate contained 1 Zn(II) ion, 1 Ni(II) ion, 2 cyanide ligands, 1 water ligand molecule, and 2 half guest 1,4-dioxane molecules.
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    Öğe
    Synthesis, crystal structure, and characterization of two heterometallic transition metal citrate complexes [M = Co(II) and Cd(II)]
    (Tubitak Scientific & Technological Research Council Turkey, 2019) Kartal, Zeki; Sahin, Onur; Yavuz, Abdulkerim
    In this study, two heterometallic transition metal complexes with the formulas [CoK4(mu(10)-C6H5O7)(2)](n) and [CdK(mu(8)-C6H5O7)(mu-H2O)(H2O)](n) were synthesized as crystalline compounds. The structures of these crystalline metal complexes were characterized by their spectral analyses (FT-IR, FT-Raman, thermal analysis, magnetic properties, and single-crystal X-ray diffraction techniques). According to the spectral data of the new metal complexes obtained, both metal complexes are in the monoclinic crystal system and in the P2(1)/c and P2(1) space groups, respectively. The asymmetric unit of the metal complex [CoK4(mu(10)-C6H5O7)(2)](n) contains one Co(II) ion, two potassium cations, and one (C6H5O7) citrate ligand, whereas that of the asymmetric unit of the metal complex [CdK(mu(8)-C6H5O7)(mu-H2O)(H2O)](n) contains one Cd(II) ion, one potassium cation, one (C6H5O7) citrate ligand, and two coordinated water molecules.
  • [ X ]
    Öğe
    The synthesis of two new Hofmann-type M(3-aminopyridine)2Ni(CN)4 [M = Zn(II) and Cd(II)] complexes and the characterization of their crystal structure by various spectroscopic methods
    (Elsevier Science Bv, 2018) Kartal, Zeki; Sahin, Onur; Yavuz, Abdulkerim
    The aim of this work is to obtain new examples of Hofmann-type complexes in single crystal form. Two novel Hofmann-type Zn(3-aminopyridine)(2)Ni(CN)(4) (1) and Cd(3-aminopyridine)(2)Ni(CN)(4) (2) complexes in a single crystal form have been synthesized and characterized by elemental, thermal and vibrational (FT-IR and FT-Raman) analysis. The general information about the structural properties of these Hofmann-type complexes 1 and 2 was acquired from the FT-IR and FT-Raman spectra by considering changes at characteristic peaks of the cyano group and 3-aminopyridine ligand molecule. The thermal behaviors of these Hofmann-type complexes 1 and 2 have also been investigated in the range of (50 600) degrees C using the TG and DTG methods. Also, the magnetic susceptibility measurements of these Hofmann-type complexes 1 and 2 were made at the room temperature using the Gouy-balance. The properties of the structure of the Hofmann-type complexes 1 and 2 have been determined by the single crystal diffraction technique. The asymmetric units of the Hofmann-type complexes 1 and 2 contain one M(II) ion [M = Zn(II) in the crystal 1 and Cd(II) in the crystal 21, one Ni(II) ion, one 3-aminopyridine ligand, and one cyanide ligand. The most important feature of the Hofmann-type complexes 1 and 2 is the presence of obvious intermolecular C-H center dot center dot center dot Ni interactions between Ni(II) ion and H atom of the 3-aminopyridine ligand molecule. All spectral and thermal data also support the crystal structures of the Hofmann-type complexes 1 and 2. These newly obtained Hofmann-type complexes 1 and 2 can be used to imprison certain molecules suitable for the gaps in their structure or to separate certain sized molecules one from another as molecular sieves. (C) 2018 Elsevier B.V. All rights reserved.