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Articles by Wen-Zhen Wang
Total Records ( 3 ) for Wen-Zhen Wang
  Jiang-Yun Wang , Pei-Pei Yang , Wen Gu , Wen-Zhen Wang , Xin Liu and Dai-Zheng Liao
  A mononuclear ruthenium(III) complex containing ethylenediaminetetraacetate (edta), [Ru(Hedta)(Htrz)] · 4H2O (1) (Htrz = 1H-1,2,4-triazole), has been synthesized and the structure was determined by single-crystal X-ray diffraction. The complex crystallizes in the triclinic space group P1, with the unit cell parameters a = 7.212(3) , b = 9.873(4) , c = 13.806(6) , α = 91.945(6)°, β = 100.078(6)°, γ = 97.230(7) and Z = 2. The complex was also characterized by elemental analysis, IR, UV-Vis and ESR spectra. Cyclic voltammetry for the complex shows a ruthenium(III)/ruthenium(IV) oxidation and a ruthenium(III)/ruthenium(II) reduction within the range of -1.5-0.5 V. Magnetic susceptibility data give an effective moment of 1.81 B.M. at room temperature.
  Cai-Xia Yin , Jing Su , Fang-Jun Huo , Rayyat-H. Ismayilov , Wen-Zhen Wang , Gene-Hsiang Lee , Chen-Yu Yeh and Shie-Ming Peng
  The synthesis, crystal structures, electrochemical, and magnetic properties of a linear pentanuclear Ni5 compound derived from an oligo-α-pyridylamino ligand, [Ni5(μ-dmpdda)4(NCS)2] [dmpdda-H2 = N,N'-di(4-methylpyridin-2-yl)pyridine-2,6-diamine], are reported. Ni5(μ-dmpdda)4(NCS)2 involve a Ni5 linear chain unit with all of the Ni-Ni-Ni angles being nearly 180°, terminated by two axial ligands. The pentanuclear linear metal chain is helically wrapped by four syn-syn-syn-syn type dmpdda2- ligands. There are two types of Ni-Ni distances in this complex. Terminal Ni-Ni distances bonded with the axial ligand are longer (2.377 Å); the inner Ni-Ni distances are short at 2.2968 Å. Terminal Ni(II) ions bonded with the axial ligands are square-pyramidal (NiN4NCS) with long Ni-N bonds (2.092 Å), consistent with a high-spin Ni(II) configuration. The inner three Ni(II) ions have short Ni-N (1.901-1.925 Å) bond distances, consistent with a square planar (NiN4), diamagnetic arrangement of a low-spin Ni(II) configuration. This compound exhibits magnetic behavior similar to [Ni5(μ-tpda)4(NCS)2], indicating an antiferromagnetic interaction of two terminal high-spin Ni(II) ions.
  Jiang-Yun Wang , Wen Gu , Wen-Zhen Wang , Xin Liu and Dai-Zheng Liao
  A ruthenium(III) complex containing ethylenediaminetetraacetate (edta), [{Ru(Hedta)}2(Pyz)] · 8H2O (1) (Pyz = pyrazine), has been synthesized by the reaction between K[Ru(Hedta)Cl] · 1.5H2O and pyrazine. The structure of the complex was determined by single X-ray diffraction. Complex 1 crystallizes in the triclinic space group P -1 with a = 7.293(9) Å, b = 10.575(14) Å, c = 12.742(16) Å, α = 104.044(19)°, β = 91.893(19)°, γ = 93.35(2)°, Z = 1. The product was also characterized by IR, UV-Vis, EPR spectrum and magnetic techniques.
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