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  • crystal structure  (3)
  • Manganese(II) nitrate  (1)
  • X-ray crystallography  (1)
  • 1
    Digitale Medien
    Digitale Medien
    Synthesis and crystal structures of quadruply carboxylate-bridged dimeric lanthanide(III) complexes of betaine (1999)
    Springer
    Journal of chemical crystallography 29 (1999), S. 309-316 
    Details
    ISSN: 1572-8854
    Schlagwort(e): Europium ; terbium ; betaine ; crystal structure
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Notizen: Abstract Three dimeric lanthanide(III) complexes, [Eu2(bet)8(H2O)4](CIO4)6 (1), [Tb2(bet)8(H2O)4](ClO4)6 (2), and [Eu2(bet)4(H2O)8] Cl6·6H2O (3) (bet = Me3N+CH2COO−, trimethyl-aminoacetate), have been prepared and structurally characterized by X-ray crystallography. Complex 1 crystallizes in the monoclinic space group P21/c, with a = 11.7807(8), b = 27.757(5), c = 11.7980(8) Å, β = 99.500(4)°, V = 3805.1(8) Å3, and Z = 2. Complex 2 is isomorphous to complex 1, crystallizing in the monoclinic space group P21/c, with a = 11.7769(14), b = 27.725(3), c = 11.795(5) Å, β = 99.668(14)°, V = 3797(2) Å3, and Z = 2. Complex 3 crystallizes in the orthorhombic space group Pbca, with a = 12.5664(8), b = 17.8645(9), c = 22.2573(8) Å, V = 4996.6(4) Å3 and Z = 4. Both complexes 1 and 2 comprise quadruply carboxylate-O,O′-bridged [M2(bet)4]6+ dimeric cores (M = Eu, Tb), and each metal ion is further coordinated by two terminal aqua ligands and two monodentate bet carboxylates to form a distorted square-antiprismatic coordination geometry. Complex 3 also has a [Eu2(bet)4]6+ core, in which two bet ligands act in the η1:η1:μ2 bridging fashion, and the other two bet ligands in the less common η2:η1:μ2 bridging fashion, namely bridging-chelate mode. Each europium(III) ion in complex 3 is further coordinated by four water molecules to complete a monocapped square antiprism.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1009573801943
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  • 2
    Digitale Medien
    Digitale Medien
    Crystal and molecular structure of aquabis(2,2′-bipyridine)nitratomanganese(II) nitrate monohydrate (1995)
    Springer
    Journal of chemical crystallography 25 (1995), S. 605-607 
    Details
    ISSN: 1572-8854
    Schlagwort(e): Manganese(II) nitrate ; 2,2′-bipyridine
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Notizen: Abstract A new monomeric manganese(II) nitrate complex with 2,2′-bipyridine (bpy), [Mn(bpy)2(NO3)(H2O)](NO3)·H2O, has been prepared and characterized by X-ray crystallography. The complex crystallizes in the triclinic space group $$P\bar 1$$ witha=9.721(3),b=14.691(5),c=8.578(3) Å, α=106.79(3), β=96.05(3), γ=82.55(3)°,V=1159.9 Å3 andZ=2. The structure comprises discrete cation [Mn(bpy)2(NO3)(H2O)]+ in which the metal atom is coordinated by a pair of bidentate bpy ligands [Mn−N=2.261(4)−2.299(4) Å], a unidentate nitrato [Mn−O=2.284(4) Å] and aqua [Mn−O=2.160(3) Å] ligands in a highly distorted octahedral arrangement.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01667032
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  • 3
    Digitale Medien
    Digitale Medien
    Crystal structure of [Co(o-SC6H4NH2){P(OMe)3}3]PF6 (1998)
    Springer
    Journal of chemical crystallography 28 (1998), S. 635-638 
    Details
    ISSN: 1572-8854
    Schlagwort(e): Cobalt(II) ; 2-aminobenzenethiol ; trimethylphosphite ; crystal structure
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Notizen: Abstract A cobalt-thiolato-phosphite complex [Co(o-SC6H4NH2){P(OMe)3}3]PF6 has been prepared and characterized by X-ray crystallography. The complex crystallizes in the triclinic space group $$P\bar 1$$ with a = 10.590(4), b = 11.122(3), c = 13.577(5) Å, α = 101.85(1), β = 108.50(1), γ = 101.75(1)°, V = 1420.6(8) Å3, and Z = 2. The structure comprises discrete [Co(o-SC6H4NH2){P(OMe)3}3]+ cations and PF 6 − anions where the metal atom is coordinated in a highly distorted square-pyramidal environment by one chelate o-SC6H4NH 2 − (abt) and two P(OMe)3 ligands in the basal positions, and a third P(OMe)3 in the axial site with Co–N,, 1.847(5), Co–S, 2.166(2), Co–P, 2.157(2), 2.147(2), and 2.125(2) Å.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1022417127336
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  • 4
    Digitale Medien
    Digitale Medien
    Synthesis, crystal structure and properties of square-planar acetato{[(4-methylimidazol-5-yl)methylene]histamine} copper(II) perchlorate (1999)
    Springer
    Journal of chemical crystallography 29 (1999), S. 409-412 
    Details
    ISSN: 1572-8854
    Schlagwort(e): copper(II) ; Schiff base ; polymidazole ; crystal structure ; properties
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Notizen: Abstract The square-planar complex [Cu(MIMH)(CH3CO2)](ClO4) (1) (MIMH = [(4-methylimidazol-5-yl)methylene]histamine) was prepared and structurally characterized. Complex 1 crystallizes in the monoclinic space group P21/n with a = 10.5331(10), b = 12.6177(10), c = 12.9773(10) Å, β = 107.710(10)°, V = 1643.0(2) Å3, and Z = 4. Single-crystal X-ray analysis reveals that the copper(II) atom in 1 has a distorted square-planar environment defined by three nitrogen atoms from the Schiff base ligand and one oxygen atom from the acetate group. The Cu—N bond lengths range from 1.950(3) to 2.015(3) Å and the Cu—O(1) bond length is 1.952(2) Å. The electronic spectra of 1 in aqueous solutions indicates that 1 forms adducts of square-pyramidal geometry with H2O. Cyclic voltammetry of 1 in DMF solution shows that there is some degradation of 1 upon reduction.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1009558826050
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  • 5
    Digitale Medien
    Digitale Medien
    Metal-betaine interactions. Part 17: A study of intradimer Cu · · · Cu distance variation in copper(II) betaine complexes containing [Cu2 (carboxylato-O,O′)4L2]n+ species (1993)
    Springer
    Structural chemistry 4 (1993), S. 247-259 
    Details
    ISSN: 1572-9001
    Schlagwort(e): Copper complexes ; X-ray crystallography ; intradimer Cu ⋯ Cu distance
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract Four copper(II) complexes of betaines, [Cu2(BET)4Cl2][Cu(BET)2Cl2]Cl2 (2), [Cu2(pyBET)4Cl2]3[CuCl4]2Cl2 (3), [Cu, (pyBET)4 (H2O)2] (NO3)4 · 2H2O (4), and [Cu2(ppBET)4(H2O)2](ClO4)4 · 4H2O (5), (BET = Me3N+CH2COO−; pyBET = C5H5N+CH2COO−; ppBET=C5H5N+CH2CH2COO−), have been prepared and characterized by X-ray crystallography. These complexes all contain dimeric [Cu2 (carboxylato-O,O′)4L2] structures [basal Cu-O=1.955(4) ∼ 1.991(2), Cu ⋯ Cu=2.602(1) ∼ 2.759(1) Å] with the apical ligand L=Cl− in (2) and (3) [Cu-Cl=2.415(1) ∼ 2.436(3) Å] and L = H2O in (4) and (5) [Cu-OH2=2.158(4) ∼ 2.192(3) Å]; also present are a discrete [Cu(BET)2Cl2] molecule with a compressed tetrahedral CuO2Cl2 chromophore involving two unidentate carboxylate ligands [Cu-O=1.916(2), Cu-Cl=2.254(1) Å] in (2), and a discrete C3v [CuCl4]2− anion in (3). Generally the intradimer Cu ⋯ Cu distance may be correlated to the electronic repulsion of the metal-ligand bonds in the CuO4L chromophore, as well as the steric interaction between the carboxylate moieties and the apical ligand.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00673699
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