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Walter Purcell Izak M. Potgieter Llewellyn J. Damoense Johann G. Leipoldt 《Transition Metal Chemistry》1992,17(5):387-389
The crystal structure of (AsPh4)2[ReN(H2O)(CN)4]·5H2O has been determined from three-dimensional X-ray diffraction data. The yellow crystals are monoclinic, space group P21/n with cell dimensionsa=15.482(1),b=19.950(2),c=16.999(1)? and β=101.69(6)o,Z=4,D
expt=1.48(1)g cm−3 andD
calc=1.52g cm−3. The anisotropic refinement of 7858 observed reflections converged toR=0.055. The [ReN(H2O)(CN)4]2− ion has a distorted octahedral geometry. Bond distances: Re≡N=1.639(8), Re−OH2=2.496(7) and Re−C(av)=2.11(1) ?. The rhenium atom is displaced by 0.35 ? out of the plane formed by the four carbon atoms of the cyano ligands
towards the terminal nitrido ligand.
TMC 2479 相似文献
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Tanner PA Zhou X Wong WT Kratzer C Yersin H 《The journal of physical chemistry. B》2005,109(27):13083-13090
The compound Tb[Au(CN)2]3.3H(2)O crystallizes in a layered structure in the hexagonal space group P6(3)/mcm with the 9-coordinate environment of Tb3+ comprising six (CN)- and three OH2 in a tricapped trigonal prism. The shortest Au...Au distance is 3.31 angstroms. The vibrational spectra show that the series Ln[Au(CN)2]3.3H2O (Ln = Y, Pr, Sm, Eu, Tb) are isostructural. The electronic spectra of Eu[Au(CN)2]3.3H2O clearly show that Eu3+ occupies one site of spectroscopic site symmetry D3h, in agreement with the crystallographic data. The electronic emission and absorption spectra of Tb[Au(CN)2]3.3H2O have been recorded at temperatures down to 1.5 K, and the f-f pure electronic transitions are interpreted in detail as arising from the lowest electronic states (in D3h symmetry) (7F6)E' in absorption and (5D4)E' in emission. At low energy, further bands are assigned to the vibronic structure of the CN stretching and water stretching modes, with the latter more predominant. Although the CN stretching vibrations show exclusive infrared or Raman activity in Tb[Au(CN)2]3.3H2O, both of these infrared and Raman active modes are observed in the two-center vibronic transitions. The reasons for this are discussed. 相似文献
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The common explosives, RDX (1,3,5-trinitro-1,3,5-triazacyclohexane), HMX (1,3,5,7- tetranitro-1,3,5,7-tetraazacyclooctane) and TNT (trinitrotoluene), were considered adequately for all weapons applications. Due to many catastrophic explosions resulting from unintentional initia-tion of impact, friction or shock, these explosives have become less attractive. TATB (1,3,5-tria- mino-2,4,6-trinitrobenzene) is noted for its insensitivity, however, it does not have the energetic performance of e… 相似文献
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The title complex has been obtained by the reaction of cobalt sulfate heptahydrate
with 4,4'-bpy and 4-abaH (4,4'-bpy = 4,4'-bipyridine, 4-abaH = 4-aminobenzonic acid) in ethanol
solution, and its structure was determined by X-ray crystallography with the following data:
tetragonal, space group P42/n, Mr = 5692.46, Co8C192H288N32O120S8, a = b = 16.402(5), c =
22.750(5) (A), Z = 1, V = 6120(2) (A)3, F(000) = 2968, Dc = 1.544 g/cm3,μ = 0.707 mm- 1, the final R
= 0.0786 and wR = 0.1935 for 2673 observed reflections (I > 2σ(I)). The title complex consists of
polymeric [Co(4,4'-bipy)(H2O)4]2+ cation chains, SO42- anions, lattice 4-abaH and water mole
cules. The center CoⅡ ions are connected by bridging 4,4'-bpy ligands exhibiting one-dimensional
chains, and coordinated by four water molecules into a distorted octahedral geometry. These chains
are further extended by hydrogen bonds among SO42- anions, coordinated and lattice water
molecules as well as lattice 4-abaH molecules into a three-dimensional network. 相似文献
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Masato Hashimoto Michiru Kubata Atsushi Yagasaki 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(12):1411-1412
The title compound, triammonium cis‐diaqua‐cis‐dioxo‐trans‐disulfatovanadate 1.5‐hydrate, was obtained by oxidizing VIV to VV in a 2 M sulfuric acid solution of vanadyl sulfate and adding ammonium sulfate. Here, the V atom is sandwiched by two sulfate groups by corner‐sharing to form a discrete [VO2(SO4)2(OH2)2]3? anion. The water molecules occupy cis positions in the equatorial plane of the vanadium octahedron. 相似文献
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1 INTRODUCTION In recent years, cyano-bridged heterometallic coordination compounds have inspired remarkable attention due to their rich and interesting structures and magnetic behaviors. However, these studies were mainly focused on the transition metals. Although several unusual cyanide bridging lanthanide-transition metal complexes have been re- ported[1~6], this field continuously possesses tre- mendous researching potentialities. As regardsPrussian Blue lanthanide complex, divers… 相似文献
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Juraj Kuchr Juraj ernk Werner Massa 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(8):m418-m420
The title compound, bis[diaquabis(ethylenediamine‐κ2N,N′)copper(II)] hexacyanoiron(II) tetrahydrate, [Cu(C2H8N2)2(H2O)1.935]2[Fe(CN)6]·4H2O, was crystallized from an aqueous reaction mixture initially containing CuSO4, K3[Fe(CN)6] and ethylenediamine (en) in a 3:2:6 molar ratio. Its structure is ionic and is built up of two crystallographically different cations, viz. [Cu(en)2(H2O)2]2+ and [Cu(en)2(H2O)1.87]2+, there being a deficiency of aqua ligands in the latter, [Fe(CN)6]4− anions and disordered solvent water molecules. All the metal atoms lie on centres of inversion. The Cu atom is octahedrally coordinated by two chelate‐bonded en molecules [mean Cu—N = 2.016 (2) Å] in the equatorial plane, and by axial aqua ligands, showing very long distances due to the Jahn–Teller effect [mean Cu—O = 2.611 (2) Å]. In one of the cations, significant underoccupation of the O‐atom site is observed, correlated with the appearance of a non‐coordinated water molecule. This is interpreted as the partial contribution of a hydrate isomer. The [Fe(CN)6]4− anions form quite regular octahedra, with a mean Fe—C distance of 1.913 (2) Å. The dominant intermolecular interactions are cation–anion O—H⋯N hydrogen bonds and these interactions form layers parallel to (001). 相似文献
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V. G. Zubkov A. P. Tyutyunnik I. F. Berger V. N. Krasil’nikov L. A. Perelyaeva I. V. Baklanova 《Russian Journal of Inorganic Chemistry》2007,52(9):1415-1423
The crystal structure of dioxovanadium(V) sulfate trihydrates A[VO2(SO4)(H2O)2] · H2O, where A is K, Rb, Tl, or NH4, has been determined based on a combination of neutron and X-ray diffraction data. The compounds are isostructural and have a monoclinic lattice (space group P21, Z = 2) with unit cell parameters a = 6.24535(8), 6.26016(7), 6.25817(5), and 6.2500(1) Å; b = 9.8417(1), 9.99736(8), 9.96217(9), and 9.9742(1) Å; c = 6.52113(8), 6.69303(5), 6.70379(6), and 6.70334(9) Å; β = 106.99(1)°, 107.83(1)°, and 107.83(1)°, 107.99(1)°, respectively. The SO4 tetrahedra and VO4(H2O)2 octahedra share an oxygen vertex to form infinite isolated chains. Atoms A have CN = 10. IR and Raman spectroscopy data are reported. 相似文献
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I. V. Medrish E. V. Peresypkina A. V. Virovets L. B. Serezhkina 《Russian Journal of Coordination Chemistry》2006,32(12):910-914
The single crystals of (C2H7N4O)2[UO2(C2O4)2(H2O)] were studied by X-ray diffraction. The crystals are monoclinic, space group Pn, Z = 2, unit cell parameters: a = 9.4123(2) Å, b = 8.4591(2) Å, c = 11.8740(3) Å, β = 105.500(10)°, V = 911.02(4) Å3. The main structural units of the crystals of I are islet complex groups [UO2(C2O4)2(H2O)]2? corresponding to the crystal chemical group AB 2 01 M1 (A = UO UO 2 2+ , B01 = C2O 4 2? , M = H2O) of uranyl complexes. Uranium-containing mononuclear complexes are connected into a three-dimensional framework through the electrostatic interactions and hydrogen bonding system involving carbamyolguanidinium ions. 相似文献
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