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  • Artikel  (12.981)
  • Springer  (12.981)
  • 1980-1984  (12.981)
  • Geologie und Paläontologie  (12.981)
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  • Artikel  (12.981)
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  • 1
    Digitale Medien
    Digitale Medien
    Binding of alkaline earth metal ions to nucleotides: crystal structure of a hydrated strontium salt of inosine-5′-monophosphate (1980)
    Springer
    Journal of chemical crystallography 10 (1980), S. 19-30 
    Details
    ISSN: 1572-8854
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Notizen: Abstract Crystals of Sr2+ (C10H11PN4O8)2− · 6.5H2O are orthorhombic, space groupP212121, witha = 21.925(1),b = 21.503(1),c = 8.600(1) Å, and eight formula weights per unit cell. A trial structure was obtained by Patterson, superposition, and Fourier techniques and was refined by full-matrix least-squares calculations using absorption-corrected, CuKα, diffractometer data. The finalR index is 0.032. A strontium ion is coordinated to N(7), the site that is often involved in the binding of transition metals to purine nucleotides. Strontium ions are also directly coordinated to a phosphate-oxygen atom and to ribose-hydroxyl groups. These direct interactions are accompanied by a number of outer-sphere, water-mediated contacts of strontium ions with various acceptor sites on the nucleotides.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01209550
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  • 2
    Digitale Medien
    Digitale Medien
    Crystal and molecular structure of dichloro(R(+)-N,N,N′,N′-tetramethyl-1,2-propylenediamine)cobalt(II) (1980)
    Springer
    Journal of chemical crystallography 10 (1980), S. 55-60 
    Details
    ISSN: 1572-8854
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Notizen: Abstract The structure of the title complex [Co(R-Me4pn)Cl2] has been determined by single-crystal X-ray analysis and refined by least-squares methods based on diffractometer data (1224 counter intensities,R = 0.044). The blue crystals are orthorhombic, space groupP212121, withZ = 4,a = 8.254(3),b = 10.926(4) andc = 13.584(5) Å. The cobalt(II) ion has a distorted tetrahedral coordination geometry with N-Co-N 87.8 ° and Cl-Co-Cl 118.5 °. The observed distortions are compared with those reported for analogous quasitetrahedral [M(II)(diamine)(dihalide)] complexes.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01387365
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  • 3
    Digitale Medien
    Digitale Medien
    Crystal structure of dicyanatobis(pyridinato)-copper(II) (1980)
    Springer
    Journal of chemical crystallography 10 (1980), S. 61-66 
    Details
    ISSN: 1572-8854
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Notizen: Abstract The crystal structure of dicyanatobis(pyridinato)copper(II), C12H5CuN4O2, was determined from 658 X-ray diffraction data obtained by the θ-2θ scanning technique with MoKα radiation on a SYNTEX P21 four-circle diffractometer. The blue crystals are tetragonal:I41/a,a = 15.649(3),c = 9.917(3) Å, andZ = 8. The structure was determined by the heavy-atom method and refined by full-matrix least squares toR = 7.1%. Nonhydrogen atoms were refined anisotropically, and the positional parameters of hydrogen atoms were calculated from geometrical considerations. The copper atom is planarlytrans coordinated by two nitrogen atoms from the NCO groups and two nitrogen atoms from the pyridine molecules. The oxygen atoms from two of the approximately linear NCO groups complete the Cu(II) coordination as a distorted octahedron. Through their oxygen and nitrogen atoms, the NCO groups link the metal atoms to the skeleton structure. The bond lengths are 1.15 and 1.18 Å for N-C and C-O, respectively, the N-C-O bond angle being 176.8 °. The bond lengths Cu-N in square-planar coordination are 1.95 and 2.05 Å, while the Cu-O bonds are out of plane and 2.61 Å in length.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01387366
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  • 4
    Digitale Medien
    Digitale Medien
    Book reviews (1980)
    Springer
    Journal of chemical crystallography 10 (1980), S. 101-102 
    Details
    ISSN: 1572-8854
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01387371
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  • 5
    Digitale Medien
    Digitale Medien
    Crystal and molecular structure of 17-β-methyl-α-isolupanine perchlorate (1980)
    Springer
    Journal of chemical crystallography 10 (1980), S. 75-81 
    Details
    ISSN: 1572-8854
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Notizen: Abstract The formula of the title compound is C16H27ClN2O5,P21/a = 8.348(1),b = 10.127(1),c = 11.264(2) Å, β = 116.42(1) °,Z = 2,D x = 1.41 g cm−3,V c = 852.8(2) Å3,MW = 362.9, μ (CuKα) = 2.25 mm−1. The structure was solved by direct methods and refined by full-matrix least squares to anR value of 0.055 for 1197 reflections. The cation consists of twotrans quinolizidine systems. RingA is a distorted half-chair, and the remaining rings are chairs. The CH3 group attached to C(17) is in the axial position. There is a weak hydrogen bond between N(16) and O(2) of the ClO 4 − group with N(16) ... O(2) distance 2.968(7) Å.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01387368
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  • 6
    Digitale Medien
    Digitale Medien
    Crystal and molecular structure of dichlorofluoroacetamide (1980)
    Springer
    Journal of chemical crystallography 10 (1980), S. 115-121 
    Details
    ISSN: 1572-8854
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Notizen: Abstract The crystal structure of dichlorofluoroacetamide has been determined from three-dimensional counter data, and refined by full-matrix least-squares techniques. The crystals belong to the monoclinic space groupP21 /c and have the unit-cell parametersa = 10.207(4),b = 5.729(2),c = 9.971(4) Å, β = 105.21(8) °, andD x = 1.72 g cm-3. The structural refinement gave a finalR factor of 0.067 from 440 observed reflections. The compound has nearly equal disorder of the -Cl2F moiety about the C-C bond axis with occupancy factors of the two fragments being 0.48 and 0.52.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01237623
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  • 7
    Digitale Medien
    Digitale Medien
    Crystal structures of two local anesthetics: dibucaine · HCl · H2O and dimethisoquin · HCl · H2 O. II. Revised parameters, bond distances, and bond angles (1980)
    Springer
    Journal of chemical crystallography 10 (1980), S. 157-161 
    Details
    ISSN: 1572-8854
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Notizen: Abstract Corrected values of some of the positional parameters of the title compounds are presented, together with the revised molecular geometries. All of the changes in these are quite small; the original discussion of them (Hayward and Donohue, 1977) does require revision.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01237626
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  • 8
    Digitale Medien
    Digitale Medien
    Cesium diiododimethylaluminatep-xylene solvate: Change in space group (1980)
    Springer
    Journal of chemical crystallography 10 (1980), S. 163-166 
    Details
    ISSN: 1572-8854
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Notizen: Summary The crystal structure of thep-xylene solvate of diiododimethylaluminate was previously described and refined in the acentric space groupC2221 (Rogers and Atwood, 1979). It can be better described and more satisfactorily refined in the centric space groupCcmm.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01237627
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  • 9
    Digitale Medien
    Digitale Medien
    Relations between the phase angles of symmetry-related reflections (1980)
    Springer
    Journal of chemical crystallography 10 (1980), S. 175-175 
    Details
    ISSN: 1572-8854
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01237630
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  • 10
    Digitale Medien
    Digitale Medien
    Crystal structure of μ-adeninatobis (methylmercury (II)) perchlorate monohydrate (1980)
    Springer
    Journal of chemical crystallography 10 (1980), S. 149-156 
    Details
    ISSN: 1572-8854
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Notizen: Abstract The title compound belongs to the triclinic space groupP¯1,a= 8.189 Å,b = 9.863 Å,c = 10.726 Å, α = 69.93 °, β = 68.62 °, γ = 73.66 °, andZ = 2. The structure was refined on 1337 observed reflections to anR factor of 0.042. The crystals contain [adeninato(CH3Hg)2]+ complex cations in which mercury is linearly bonded to N(7) and N(9) of a deprotonated adenine ring. Centrosymmetrically related complex cations are paired via two N(6)-H(6) ⋯ N(l) hydrogen bonds. Those planar units are stacked in the crystal with a distance of ∼ 3.4 Å between rings. The water molecule and the ClO4 -ion are involved in hydrogen bonding and Hg⋯O contacts. This structure identifies N(7) as the best residual coordination site after H(9) has been substituted by CH3Hg.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01237625
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