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Ki-Young Choi Seung-Man Yang Kyu-Chul Lee Haiil Ryu Chan Hee Lee Jungho Seo Mancheol Suh 《Transition Metal Chemistry》2008,33(1):99-105
The tridentate ligand 2-Oximino-3-thiosemicarbazone-2,3-butanedione (Hotsb) reacts with MCl2 (M = Ni2+ or Cu2+) to give rise to the mononuclear complexes [Ni(Hotsb)2]Cl2 · H2O (1) and [Cu(Hotsb)Cl2] · H2O (2). These complexes have been characterized by X-ray crystallography, spectroscopy, and cyclic voltammetry. The nickel(II) ion
in (1) is in a six-coordinate octahedral environment being bonded to the two protonated tridentate ligands which occupy mer positions. The copper(II) ion in (2) is in a five-coordinate square-pyramidal geometry, in which the basal plane is made up the two nitrogens, sulfur, and chloride
atom, while the other chloride atom is coordinated at the axial position. The cyclic voltammogram of the complexes displays
two one-electron waves corresponding to MII/MIII and MII/MI processes. The electronic as well as infrared spectral properties of the title complexes are reported and discussed. 相似文献
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Nack-Do Sung Ki-Young Choi Han-Hyoung Lee Kyu-Chul Lee Moon-Jip Kim 《Transition Metal Chemistry》2005,30(3):273-277
The reaction of CuCl2 · 2H2O and CdCl2 with di-(2-picolyl)sulfide (dps) leads to the formation of mononuclear
copper(II) and binuclear cadmium(II) complexes, [Cu(dps)Cl2] · H2O (1) and [(dps)(Cl)CdII(μ-Cl)2CdII(Cl)(dps)] (2). The copper atom in (1) is coordinated to one sulfur and two nitrogen atoms from the dps ligand and two chlorides in a distorted square-pyramidal environment. Complex (2) has two distorted octahedra sharing the basal edge that contain the bridging chloro ligands, each of which resides at a center of inversion. Cyclic voltammetric
data show that (1) undergoes two reversible one-electron waves corresponding to CuII/CuIII and CuII/CuI processes. However, cyclic voltammetry of (2) gives two irreversible reduced waves. 相似文献
3.
Choi Ki-Young Jeon Yong-Man Lee Kyu-Chul Choi Suk-Nam Kim Moon-Won Lim Hae-Hwan Kim Moon-Jip 《Transition Metal Chemistry》2004,29(4):405-410
Tetradentate Schiff-base carboxylate-containing ligands, bis(2-pyridylmethyl)amino-3-propionic acid (Hpmpa) and bis(2-pyridylmethyl)amino-4-butyric acid (Hpmba), react with CuCl2 to give rise to the mononuclear complexes [Cu(Hpmpa)Cl]Cl · 2H2O (1) and [Cu(Hpmba)Cl2]· H2O (2). These complexes have been characterized by X-ray crystallography, spectroscopic and cyclic voltammetry. Crystal structure of (1) shows that the copper(II) ion has a distorted square-pyramidal geometry with the three nitrogen atoms of the Hpmpa ligand and one chloride anion occupying the basal plane and an oxygen atom from the carboxylate group coordinating the axial position. In (2), the coordination environment around the copper(II) ion reveals a distorted square-pyramids with three nitrogen atoms of the Hpmba ligand and one chloride anion that comprise the basal plane, whereas the apical position is filled by the chloride anion. Cyclic voltammetry of the complexes gives two one-electron waves corresponding to CuII/CuIII and CuIII/CuI processes. The electronic spectra and redox potentials of the complexes are influenced significantly by the N-pendant carboxylate groups. 相似文献
4.
Ki-Young Choi Hee-Kune Lee Ki-Jung Kim Haiil Ryu Kyu-Chul Lee Jaejung Ko Moon-Jip Kim 《Transition Metal Chemistry》2006,31(8):1093-1097
The complexes [Co(L)Cl2]Cl · 4H2O (1) and [Co(L)(N3)2]N3 · 2H2O (2) (L = 3,14-dimethyl-2,6,13,17-tetraazatricyclo [14,4,01.18,07.12]docosane) have been synthesized, and structurally characterized by X-ray crystallography, spectroscopy and cyclic voltammetry.
The crystal structure of (1) is centrosymmetric and the cobalt(III) atom has an axially elongated octahedral geometry with four nitrogen atoms of the
macrocycle and two chloride ligands. The cobalt(III) ion in (2) is coordinated to four nitrogen atoms from the macrocycle, and two azide ligands in an octahedral environment, which forms
the 1D polymer through hydrogen bonding contacts involving the cation, azide anion and solvent water molecules. Electronic
spectra of the complexes also exhibit a low-spin octahedral environment. Cyclic voltammetry of the complexes undergoes a one-electron
wave corresponding to Co(III)/Co(II) processes. The electronic spectra and electrochemical behaviors of the complexes are
significantly affected by the nature of the axial ligands. 相似文献
5.
Ki-Young Choi Min-Ah Whang Han-Hyoung Lee Kyu-Chul Lee Moon-Jip Kim 《Transition Metal Chemistry》2004,29(7):792-796
Two mononuclear copper(II) complexes [Cu(L)(NO2)](ClO4) (1) and [Cu(L)(MO4)]2· 5H2O (2) (L = 1,3,10, 12,16,19-hexaazatetracyclo[17,3,1,112.16,04.9]tetracosane) have been synthesized and their structures determined. Both compounds show a distorted square-pyramidal geometry with the two secondary and two tertiary amines of the macrocycle and one ligand coordinated at the axial position. Cyclic voltammetry of the complexes gives two one-electron waves corresponding to CuII/CuIII and CuII/CuI processes. The electronic spectra and electrochemical behavior of the complexes are significantly affected by the nature of the organic ligands. 相似文献
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