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Journal ArticleDOI

Tris(2,2′‐bipyridine‐κ2N,N′)copper(II) bis(tetrafluoridoborate)

01 Jul 2007-Acta Crystallographica Section E-structure Reports Online (International Union of Crystallography (IUCr))-Vol. 63, Iss: 7
Abstract: The title compound, [Cu(C 10 H 8 N 2 ) 3 ](BF 4 ) 2 , shows the expected Jahn-Teller distortion at the pseudo-octa¬hedrally coordinated Cu II atom. Each Cu II complex cation is surrounded by six BF 4 - anions and each anion by three cations with weak C-H F hydrogen bonds between them. One of the two BF 4 - anions exhibits a rotational disorder (0.6:0.4) around one of the B-F bonds.

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Topics: 2,2'-Bipyridine (54%)
Citations
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Journal ArticleDOI
26 May 2011-Polyhedron
Abstract: A copper(II) sulfate complex of formula [Cu(bpy)2(O2SO2)]·CH3OH (1) (bpy = 2,2′-bipyridine) was prepared and characterized by X-ray diffraction, spectroscopic methods (FIR, IR, NIR–Vis–UV, EPR) and magnetic measurement The S–O distances in the chelating SO 4 2 - entity give the value of the geometric distortion parameter Δr = 0022 The EPR g parameters are temperature dependent and indicated the fluxional model of the [Cu(N,N′)2OO] chromophore with d x 2 - y 2 ground state The electronic spectrum of 1 exhibits the maxima at 9740 and 14 630 cm−1 The very weak antiferromagnetic interaction between copper centers in the crystal lattice was observed In [Cu(bpy)3][SO4]·75H2O (2) crystal the distance values in [Cu(bpy)3]2+ cations result in T = 0958 and the value of Δr of the non-coordinate SO 4 2 - tetrahedron is 0095 The value of T for [CuN6] (2) suggests the fluxional character of Jahn–Teller (JT) distortion supported by the EPR studies The electronic spectrum shows two separated bands at 6900 and 14 400 cm−1

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9 citations


Journal ArticleDOI
Abstract: We report the hydro­thermal syntheses and crystal structures of aqua­bis­(2,2′-bi­pyridine-κ2N,N′)copper(II) hexa­fluorido­silicate tetra­hydrate, [Cu(bpy)2(H2O)][SiF6]·4H2O (bpy is 2,2′-bi­pyridine, C10H8N2), (I), bis­(2,2′-bi­pyridine-3κ2N,N′)-di-μ-fluorido-1:3κ2F:F;2:3κ2F:F-deca­fluorido-1κ5F,2κ5F-ditantalum(V)copper(II), [Cu(bpy)2(TaF6)2], (II), tris­(2,2′-bi­pyridine-κ2N,N′)copper(II) bis[hexa­fluorido­tantalate(V)], [Cu(bpy)3][TaF6]2, (III), and catena-poly[[di­aqua­(2,2′-bi­pyridine-κ2N,N′)copper(II)]-μ-fluorido-tetra­fluorido­tin-μ-fluorido], [Cu(bpy)(H2O)2SnF6]n, (IV). Compounds (I), (II) and (III) contain locally chiral copper coordination complexes with C2, D2, and D3 symmetry, respectively. The extended structures of (I) and (IV) are consolidated by O—H⋯F and O—H⋯O hydrogen bonds. The structure of (III) was found to be a merohedral (racemic) twin.

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References
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Journal ArticleDOI
Abstract: A novel and direct synthetic route for the syntheses of hexacoordinated cupric complexes involving bidentate N,N-donor ligands has been elaborated. This synthetic strategy has been successfully applied for the preparation of mixed-ligand tris(chelates).

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34 citations


Journal ArticleDOI
Xiao-Juan Yang1, Biao Wu1, Christoph Janiak1, Wen-Hua Sun2  +1 moreInstitutions (2)
Abstract: The tris(5, 5′-diamino-2, 2′-bipyridine)iron(II) complex [Fe(DABP)3]2+ can be engaged in hydrogen-bonding interactions from the amino groups to carboxylate-containing molecules as H-bond acceptors. This so-called second-sphere coordination of the metal complex is investigated here by using benzene-1, 4-dicarboxylate (terephthalate, L1), benzene-1, 3-dicarboxylate (isophthalate, L2), biphenyl-2, 2′-dicarboxylate (L3), and benzene-1, 3, 5-tricarboxylate (trimesate, L4) anions for N-H···O bonding. The second-sphere coordination of [Fe(DABP)3]2+ is further complemented by water molecules of crystallization in the isolated and structurally elucidated compounds of [Fe(DABP)3](L1)·5H2O, [Fe(DABP)3](L2)·8H2O, [Fe(DABP)3](L3)·12.5H2O, and [Fe(DABP)3]3(L4)2·20H2O. The hydrogen-bonding between [Fe(DABP)3]2+ and the dicarboxylate anions (L1-L3) decreases from a three-dimensional supramolecular network (with L1) to discrete units (with L2 and L3) with the increasing number of crystal water molecules. The tricarboxylate ligand L4 is capable of capping the triangular face formed by the three amino groups in [Fe(DABP)3]2+. The solid-state structures of DABP·2H2O and 5, 5′-bis(ethoxycarbonylamino)-2, 2′-bipyridine (BEBP) are reported. Die zweite Koordinationssphare des Tris(5, 5′-diamino-2, 2′-bipyridin)eisen-Komplexes mit Aren-Carboxylat-Liganden uber N-H···O Wasserstoff-Bindungen Der Tris(5, 5′-diamino-2, 2′-bipyridin)eisen(II)-Komplex [Fe(DABP)3]2+ kann Wasserstoff-Brucken von den Amino-Gruppen zu Carboxylat-haltigen Molekulen als H-Akzeptoren ausbilden. Diese so genannte zweite Koordinationssphare des Metall-Komplexes wird hier unter Verwendung von Benzol-1, 4-dicarboxylat (Terephthalat, L1), Benzol-1, 3-dicarboxylat (Isophthalat, L2), Biphenyl-2, 2′-dicarboxylat (L3) und Benzol-1, 3, 5-tricarboxylat (Trimesat, L4) als Anionen fur N-H···O Bindungen untersucht. Die zweite Koordinationssphare von [Fe(DABP)3]2+ wird weiterhin von Kristallwasser-Molekulen in den isolierten und strukturell charakterisierten Verbindungen [Fe(DABP)3](L1)·5H2O, [Fe(DABP)3](L2)·8H2O, [Fe(DABP)3](L3)·12.5H2O, and [Fe(DABP)3]3(L14)2·20H2O vervollstandigt. Die Wasserstoff-Bruckenbindungen zwischen [Fe(DABP)3]2+ und den Dicarboxylat-Anionen (L1-L3) nehmen von einem dreidimensionalen supramolekularen Netzwerk (mit L1) zu diskreten Einheiten (mit L2 und L3) hin mit steigender Zahl von Kristallwasser-Molekulen ab. Der Tricarboxylat-Ligand L4 vermag die von drei Amino-Gruppen in [Fe(DABP)3]2+ gebildete Dreiecksflache zu uberdachen. Die Festkorperstrukturen von DABP·2H2O und 5, 5′-Bis(ethoxycarbonylamino)-2, 2′-bipyridin (BEBP) werden beschrieben.

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19 citations


Journal ArticleDOI
Bao-Xia Dong1, Jun Peng1, Yanhui Chen1, Yumei Kong1  +3 moreInstitutions (1)
Abstract: Two new inorganic–organic hybrid polyoxovanadates, [Cu(2,2′-bipy)3]2[H4V16O38(Cl)]·4H2O 1 and [Cu(2,2′-bipy)3]3[V15O36(Cl)]·3H2O 2 (2,2′-bipy=2,2′-bipyridine), have been prepared under the hydrothermal conditions and structurally characterized by elemental analysis, IR spectra, EPR spectra, TG analyses and single-crystal X-ray diffraction. Compounds 1 and 2 are based on [V16O38(Cl)]8− and [V15O36(Cl)]6− building block, respectively. They were synthesized under the same reaction condition but in different pH range, which shows that the pH value of the reaction plays a key role in the structural control of self-assemble process.

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17 citations


Journal ArticleDOI
Zong-Ming Liu1, Zong-Hui Jiang1, Dai-Zheng Liao1, Geng-Lin Wang1  +2 moreInstitutions (1)
01 Jan 1991-Polyhedron
Abstract: The structure of Cu(bipy)3(ClO4)2` was established by X-ray crystallography. The geometry around the copper(II) ion is distorted square-pyramidal, in which only five nitrogen atoms of the three 2,2′-bipy bind to the copper(II) ion.

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14 citations


Journal ArticleDOI
Jingyang Niu1, Zi-Liang Wang1, Jingping Wang1Institutions (1)
Abstract: The title compound, [Cu(2,2′-bipy)3]2H2[H2W12O40]·4.5H2O, was synthesized by hydrothermal reaction and characterized by IR and single-crystal X-ray structural analysis. It belongs to the triclinic, space group P with a = 13.929(3) A, b = 17.493(4) A, c = 19.210(4) A, α = 86.39(3)°, β = 68.77(3)°, γ = 74.21(3)°, V = 4195.2(15) A3, Z = 2, D c = 3.158 g cm−3, μ = 16.970 mm−1, F(000) = 3602. This is the first hybrid material based on a metatungstate ion and transition metal coordination cations in which each copper atom is coordinated by six N atoms from three 2,2′-bipyridine molecules forming a distorted octahedron.

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5 citations