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Daegu, South Korea

Lim J.,Simin High School | Son Y.,Hanil High School | Gu G.,Hanil High School | Ryu S.,Andong National University | And 2 more authors.
X-ray Structure Analysis Online | Year: 2015

A dinuclear cobalt(II) complex with N,N,N′,N′-tetrakis(3,5-dimethyl-1-pyrazolyl)methyl-1,4-phenylenediamine (tpmp), [Co2(tpmp)Cl4], was isolated. The crystal structure was determined by a single-crystal X-ray diffraction method at 293 K. It crystallizes in the monoclinic space group P21/n with a = 12.4671(16)Å, b = 10.1719(13)Å, c = 29.292(4)Å, β = 101.260(3)°, V = 3643.1(8)Å3, Dx = 1.459 g/cm3, and Z = 4. The R1 [I > 2σ(I)] and wR2 (all data) values are 0.0589 and 0.1203, respectively, for all 8453 independent reflections. The complex consists of two tetrahedral cobalt(II) chromophores with two pyrazolato-nitrogen atoms of tpmp and two chloride atoms that are connected to the phenylenediamine moiety of tpmp with a Co...Co separation of 11.522(1)Å. © The Japan Society for Analytical Chemistry. Source


Lim J.,Simin High School | Park H.,Simin High School | Go H.,Simin High School | Lee J.,Simin High School | And 3 more authors.
X-ray Structure Analysis Online | Year: 2014

A copper(II) complex with bis(4-(pyridine-2-yl)pyrimidin-2-yl)disulfane (ppds), bis{[bis(4-(pyridine-2-yl)pyrimidin-2-yl)-disulfane]chloridocopper(II)} tetrachloridocuprate(II), [Cu(ppds)Cl]2[CuCl4], was isolated. The crystal structure was determined by the single-crystal X-ray diffraction method at 293 K. It crystallizes in the monoclinic space group C2/c with a = 28.985(5)Å, b = 8.7403(14)Å, c = 17.380(3)Å, β = 103.642(3)°, V = 4278.7(12)Å3, Dx = 1.795 g/cm3, and Z = 4. The R1 [I > 2σ(I)] and wR2 (all data) values are 0.0499 and 0.1115, respectively, for all 4959 independent reflections. The compound consists of two trigonal-bipyramidal copper(II) cations with a seven-membered chelate ring containing the disulfide bond of ppds and a distorted tetrahedral CuCl4 2- anion. © The Japan Society for Analytical Chemistry. Source


Lim J.,Simin High School | Kim G.,Simin High School | Do K.,Simin High School | Lee S.,Simin High School | And 4 more authors.
X-ray Structure Analysis Online | Year: 2015

Tetranuclear nickel(II) and cobalt(II) complexes with μ3-O-3,5-dimethyl-1-pyrazylmethanolato (dmpm) and μ-O,O¢-acetato, [M4(dmpm)4(O2CCH3)4]·2CH3CN (M = Ni, Co), were isolated. The crystal structures were determined by the single-crystal X-ray diffraction method at 90 K. Both of the structures are isomorphous in the tetragonal space group P42/n with a = 11.5812(11)Å, c = 16.580(2)Å, V = 2223.8(4)Å3, Dx = 1.459 g/cm3, and Z = 2 for the nickel(II) complex; these values are a = 11.608(2)Å, c = 16.717(4)Å, V = 2252.4(7)Å3, Dx = 1.555 g/cm3, and Z = 2 for the cobalt(II) complex. The R1 [I > 2σ(I)] and wR2 (all data) values are 0.0288 and 0.0842, and 0.1046 and 0.2786, for the former and the latter, respectively. Each complex has a cubane-like tetranuclear M4O4 core with octahedral NO5 geometry; the closest Ni·Ni separation is 2.9750(4)Å, or the Co·Co separation of 3.0433(19)Å. © The Japan Society for Analytical Chemistry. Source

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