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    Cyanide bridged hetero-metallic polymeric complexes: Syntheses, vibrational spectra, thermal analyses and crystal structures of complexes [M(1,2-dmi)2Ni(μ-CN)4]n (M = Zn(II) and Cd(II))
    (Elsevier Science Bv, 2015) Kurkcuoglu, Gunes Suheyla; Sayin, Elvan; Sahin, Onur
    Two cyanide bridged hetero-metallic complexes of general formula, (M(1,2-dmi)(2)Ni(mu-CN)(4)](n) (1,2-dmi = 1,2-dimethylimidazole and M = Zn(II) or Cd(II)) have been synthesized and characterized by vibrational (FT-IR and Raman) spectroscopy, single crystal X-ray diffraction, thermal analyses and elemental analyses. The crystallographic analyses reveal that the complexes, [Zn(1,2-dmi)(2)Ni(mu-CN)(4)] (1) and [Cd(1,2-dmi)(2)Ni(mu-CN)(4)] (2), have polymeric 2D networks. In the complexes, four cyanide groups of [Ni(CN)(4)](2-) coordinated to the adjacent M(II) ions and distorted octahedral geometries of complexes are completed by two nitrogen atoms of trans 1,2-dmi ligands. The structures of I and 2 are similar and linked via intermolecular hydrogen bonding, C-H center dot center dot center dot Ni interactions to give rise to 3D networks. Vibration assignments are given for all the observed bands and the spectral features also supported to the crystal structures of heteronuclear complexes. The FT-IR and Raman spectra of the complexes are very much consistent with the structural data presented. (c) 2015 Elsevier B.V. All rights reserved.
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    Dinuclear zinc(II) complex with tris(2-aminoethyl) amine ligand: synthesis, structure and properties
    (Walter De Gruyter Gmbh, 2015) Kurkcuoglu, Gunes Suheyla; Yesilel, Okan Zafer; Sahin, Onur; Sayin, Elvan; Buyukgungor, Orhan
    The dinuclear complex tris(2-aminoethyl) aminezinc(II)-mu-cyanothreecyanozincate(II) hemihydrate, [Zn(tren) Zn(mu-CN)(CN)(3)]center dot 0.5H(2)O (1) (tren = tris(2-aminoethyl)amine), has been synthesized and characterized by spectral (FT-IR and Raman), elemental, thermal analysis (TG, DTG and DTA) as well as single crystal X-ray diffraction techniques. The asymmetric unit is composed of two Zn(II) ions, one tren ligand, four cyanide ligands and a half crystal water molecule which is situated at the special position. Zn1 ion exhibits tetrahedral coordination geometry with four carbon atoms of four cyanide ligands. Zn2 ion is five-coordinated by five nitrogen atoms from one tren and one cyanide ligands in a trigonal bipyramid coordination geometry. The cyanide nitrogen is in the axial position. Adjacent dinuclear units are connected by hydrogen bonding interactions to form three dimensional network. The decomposition reaction takes place in the temperature range 30-700 degrees C in the static air atmosphere.
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    Nine new tetracyanometallate(II) complexes with 2-(2-aminoethyl)pyridine: synthesis, crystal structures and spectroscopic studies
    (Taylor & Francis Ltd, 2022) Kurkcuoglu, Gunes Suheyla; Yesilel, Okan Zafer; Sayin, Elvan; Sahin, Onur
    Nine new cyanide complexes, {[Cu(aepy)(2)M(mu-CN)(CN)(3)]center dot 2H(2)O}(n) [M(II) = Ni (1), Pd (2) or Pt (3)], [Zn(aepy)(2)M(mu-CN)(CN)(3)](n) [M = Ni (4), Pd (5) or Pt (6)] and [Cd(aepy)(2)M(mu-CN)(CN)(3)](n) [M(II) = Ni (7) or Pd (8)] and (Haepy)(2)[Pt(CN)(4)] (9) (aepy = 2-(2-aminoethyl)pyridine), were synthesized and characterized structurally using single crystal X-ray diffraction, vibrational spectroscopy, thermal and elemental analyses. The structure analyses revealed that cyanide complexes 1-3 for Cu(II) and 4-6 for Zn(II) are heterobinuclear clusters, whereas the two Cd(II) complexes 7 and 8 are infinite one-dimensional coordination polymers. In heterometallic complexes 7 and 8, the Cd(II) ions are located on a center of symmetry and are coordinated by two nitrogens from cyanide ligands and four nitrogens from aepy ligands, thus showing a distorted octahedral geometry. In 1-9, the intermolecular N-H center dot center dot center dot N hydrogen bonds or/and C-H center dot center dot center dot M interactions (M = Ni(II), Pd(II) and Pt(II)) generate 3D supramolecular networks.
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    One-dimensional heteronuclear complexes with cyanide and 2-ethylimidazole ligands
    (Taylor & Francis Inc, 2021) Kurkcuoglu, Gunes Suheyla; Sayin, Elvan; Yavuz, Tugba; Sahin, Onur
    Two tetracyanonickelate(II) complexes with 2-ethylimidazole ligand have been synthesized as single crystal form and characterized by spectroscopic (infrared and Raman) and single crystal X-ray diffraction techniques. Crystallographic investigation shows that heterometallic complexes have one-dimensional coordination polymers. Vibrational assignments are given for all the observed bands and the spectral features also supported to the crystal structures of the polynuclear complexes. The decomposition reaction takes places in the temperature range 30-700 degrees C in the dry air atmosphere.
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    Synthesis and structural analysis of heteronuclear hexacyanochromate(III) complex with tris(2-aminoethyl)amine), [Cd(tren)(Htren)][Cr(CN)6]•2H2O
    (Elsevier, 2020) Kurkcuoglu, Gunes Suheyla; Yesilel, Okan Zafer; Sayin, Elvan; Enonlu, Emir; Sahin, Onur
    The synthesis and structural investigation of a new heteronuclear hexacyanochromate(III) complex based on amine containing tetradentate ligand tris(2-aminoethyl)amine ligand (tren) are reported. The complex was characterized by spectral (FT-IR and Raman), elemental, thermal analysis (TG, DTG and DTA) as well as single crystal X-ray diffraction (SC-XRD) techniques. From elemental and spectral data, the formulae, [Cd(tren)(Htren)][Cr(CN)(6)]center dot 2H(2)O (1), for the metal complex has been proposed. Single crystal X-ray diffraction (SC-XRD) measurement showed that the asymmetric unit of 1 consists of one Cd(II) ion, one Cr(III) ion, six cyanide ligands, one tren and one Htren ligands and two crystal water molecules. The structure of 1 presents one of tren ligands was protonated and the coordinated to Cd(II) ion as a monodentate ligand. Other tren ligand was also bonded to Cd(II) ion as a tetradentate ligand to form a distorted trigonal-bipyramidal geometry. In the crystal structure, Cr(III) ion is coordinated by six carbon atoms from six different cyanide ligands, thus showing a distorted octahedral coordination geometry. In 1, The FT-IR and Raman spectral data of the complex compared with the crystallographic data, the results appear to be consistent with each other. Thermal properties of the title complex were investigated by thermogravimetric analysis (TG/DTG/DTA) in the temperature range of 30-700 degrees C in air atmosphere. (C) 2020 Elsevier B.V. All rights reserved.
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    Two-Dimensional Heteronuclear Coordination Polymers Constructed by Cyanide and 3-(2-Aminoethyl)pyridine Ligands
    (Springer, 2021) Kurkcuoglu, Gunes Suheyla; Yesilel, Okan Zafer; Sayin, Elvan; Sahin, Onur
    Two new heteronuclear (Ni/Cd and Pd/Cd) 2D coordination polymers formulated as namely {[Cd(mu-3aepy)(2)Ni(mu-CN)(2)(CN)(2)].2H(2)O}(n)(1) and [Cd(3aepy)Pd(mu(4)-CN)(4)](n)(2) (3aepy = 3-(2-aminoethyl)pyridine) were obtained and determined using different techniques (FT-IR and Raman spectroscopies, single crystal X-ray diffraction, elemental, SEM-EDX and thermal analyses). Single crystal X-ray study of the complexes revealed that the Ni(II) and Pd(II) ions are coordinated with four cyanide-carbon atoms in square planar geometries. The Cd(II) ions are bridged by 3aepy ligands to generate [Cd-2(3aepy)(2)](2+)cation and adjacent cations are further linked to cyanide ligands from [Ni(mu-CN)(4)](2-)anion, generating corrugated rectangular grid-like 2D sheets in1. Whereas, the Cd(II) and Pd(II) ions are bridged by cyanide ligands, generating corrugated rectangular grid-like 2D sheets in2. The Cd1 is possessed the distorted octahedral coordination geometry with six nitrogen atoms from two 3aepy and four cyanide ligands. The Cd2 is coordinated by four nitrogen atoms from cyanide ligands to form a square-planar geometry. Furthermore, the most remarkable properties of the complexes are the existence of the intermolecular C-HMIDLINE HORIZONTAL ELLIPSISM interactions between M(II) and hydrogen atoms of the 3aepy ligands (M(II) = Ni and Pd).
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    Unprecedented deca-, penta- and poly-heteronuclear complexes with hexacyanometallates and 2-(hydroxymethyl)pyridine
    (Pergamon-Elsevier Science Ltd, 2021) Sayin, Elvan; Kurkcuoglu, Gunes Suheyla; Yesilel, Okan Zafer; Sahin, Onur
    The reactions of hexacyanometallates (Fe(III) and Co(III)) and 2-(hydroxymethyl)pyridine (hmpy) with ZnCl2 and CdCl2 affords the decanuclear [Cd-6(hmpy)(12)Fe-2(mu-CN)(8)(CN)(4)Fe-2(mu-CN)(4)(CN)(8)] complex (1), the pentanu-clear [Cd-3(hmpy)(6)Co-2(mu-CN)(6)(CN)(6)] cage complex (2) and the 3D framework [Zn(hmpy)(2)Zn-2(hmpy)(2)Co-2(mu-CN)(8)(CN)(4)]n (3). These new cyanide-bridged heteronuclear complexes have been characterised by FT-IR and Raman spectra, together with thermal and elemental analyses. Their structures have been determined by single crystal X-ray diffraction (SC-XRD) and powder X-ray diffraction (PXRD) analyses. In 1, the Cd(II) and Fe(III) centers are arranged alternately at the four corners of a rhombic core, and the cyanide ligands coordinate to the four metal centers of this core in the bridging mode. Adjacent tetranuclear rhombic cores further extend to a decaheteronuclear cluster structure via bridging cyanide ligands. Complex 2 has a pentaheteronuclear cage structure and the neighboring two Co(III) and three Cd(II) centers are bridged by six cyanide ligands. Complex 3 features an unprecedented 3D heterometallic Co(III)-Zn(II) framework based on cyanide ligands.