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  • Articles  (15,497)
  • Springer  (14,512)
  • Society of Petroleum Engineers  (985)
  • 1970-1974  (12,300)
  • 1955-1959  (3,197)
  • Geosciences  (14,960)
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  • Articles  (15,497)
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  • 11
    Electronic Resource
    Electronic Resource
    Vibrational analysis of methanol (1972)
    Springer
    Journal of chemical crystallography 2 (1972), S. 17-22 
    Details
    ISSN: 1572-8854
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Using the proper geometry of methanol, a 16-parameter valence force field has been calculated for CH3OH, CD3OH, CH3OD and CD3OD.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01198364
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  • 12
    Electronic Resource
    Electronic Resource
    Studies in molecular structure, symmetry and conformation VI. Crystal and molecular structure of 1-aminocyclopentane carboxylic acid monohydrate (1972)
    Springer
    Journal of chemical crystallography 2 (1972), S. 53-66 
    Details
    ISSN: 1572-8854
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract 1-aminocyclopentane carboxylic acid monohydrate is monoclinic: space groupP21/c,a = 11·24,b = 6·27,c = 11·22 Å and β = 97·6 °. The crystal structure was solved by the symbolic addition method and refined to anR factor of 12·1%. The cyclopentane ring is disordered; one of the carbon atoms exists in two alternative sites, leading to two possible conformations both of which are of the envelope type.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01245860
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  • 13
    Electronic Resource
    Electronic Resource
    Crystal structure of 4,5-dinitronaphthalic anhydride (1972)
    Springer
    Journal of chemical crystallography 2 (1972), S. 79-87 
    Details
    ISSN: 1572-8854
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The structure of 4,5-dinitronaphthalic anhydride was determined in three dimensions. The molecule is not planar, the carbonyl oxygens being out of the plane of the naphthalene ring system by -0·29 and 0·26 Å. Electronic and infrared spectra seem to indicate that this deviation is not peculiar to the crystalline state. The compound crystallizes in space groupP21/c with unit cell dimensions ofa = 8·096,b = 8·813,c = 15·11 Å, and β = 92·47 °. The finalR index was 5·4%.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01245862
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  • 14
    Electronic Resource
    Electronic Resource
    Structure of a novel fluxional molecule: 1,2,3-trithia-[3]-ferrocenophane (1972)
    Springer
    Journal of chemical crystallography 2 (1972), S. 107-114 
    Details
    ISSN: 1572-8854
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The crystal and molecular structure of 1,2,3-trithia-[3]-ferrocenophane has been determined from three-dimensional X-ray data collected by counter techniques. The molecule consists of two nearly parallel, eclipsed cyclopentadienyl rings linked by an S3 bridge. The material crystallizes in the monoclinic space groupP21/c with unit cell parametersa = 9·628(3),b = 9·347(4),c= 11·408(4) Å, β = 96·70(3) °. The structure was solved by standard techniques and the least-squares refinement converged to a conventionalR factor of 9·6 %.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01464791
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  • 15
    Electronic Resource
    Electronic Resource
    Crystal and molecular structure of bis(N,N-di-n-butyldithiocarbamato)copper(III) triiodide (1972)
    Springer
    Journal of chemical crystallography 2 (1972), S. 189-196 
    Details
    ISSN: 1572-8854
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The crystal and molecular structure of bis(N,N-di-n-butyldithiocarbamato)-copper (III) triiodide, Cu(S2CN(C4H9)2)2 +I3 −, has been determined from a single-crystal X-ray diffraction study. The monoclinic unit cell, space groupP21/c,a = 14·026(6),b = 8·62(1),c = 25·015(9) Å, β = 95·35(5) °, contains four formulaentities. Three-dimensional intensity data were obtained from Weissenberg photographs. Atomic parameters were refined by full-matrix least-squares methods to a conventionalR value of 0·083 for 950 independent non-zero reflexions. The structure contains two symmetry-independent cations. In both cations, the copper atom is in planar coordination with four sulphur atoms, the mean Cu(III)-S bond length being 2·22(2) Å. Cu(III)-S distances are about 0·08 Å less than Cu(II)-S distances in comparable complexes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01275495
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  • 16
    Electronic Resource
    Electronic Resource
    Precision neutron diffraction structure determination of protein and nucleic acid components. VIII: the crystal and molecular structure of the β-form of the amino acidl-glutamic acid (1972)
    Springer
    Journal of chemical crystallography 2 (1972), S. 225-233 
    Details
    ISSN: 1572-8854
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract A neutron diffraction study of the β-form of L-glutamic acid, C5H9NO4, has been carried out. The structure is orthorhombic: space groupP212121,a= 5·159(5),b= 17·30(2),c= 6·948(7) Å andz = 4. Least-squares refinements based on 803 reflexions led to a final conventionalR value of 0·026, and bond lengths involving hydrogen atoms have been determined with an average precision of 0·004 Å. The molecule is in the zwitterion form, and no intramolecular hydrogen bonds have been found. The hydrogen atom involved in a strong hydrogen bond between two carboxyl groups in adjacent molecules (0 ... 0 distance 2·519(2) Å) is covalently bonded to the carboxyl group belonging to the side chain of the amino acid. This side chain is buckled with Cδ gauche to Cα with respect to the C β —C γ bond. The bond angles involving carbon atoms in the side chain are accordingly strained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01246639
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  • 17
    Electronic Resource
    Electronic Resource
    Crystal and molecular structure of 2-bromobenzo[b]indeno[1,2-e]pyran (1972)
    Springer
    Journal of chemical crystallography 2 (1972), S. 243-250 
    Details
    ISSN: 1572-8854
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract 2-bromobenzo[b]indeno[1,2-e]pyran crystallizes in the monoclinic system: space groupP21/c,a = 7·508,b = 5·959,c= 26·172 Å, β = 92·55 °. The structure has been determined by the heavy-atom method and refined by full-matrix least squares toR = 0·072 for 1027 observed reflections. The molecule is non-planar; the maximum deviations from the best plane occur at both ends of the length of the molecule, which results in distortion of the central portion from the expected geometry. The closest approach of two molecules, those related by a 21 axis, is 3·5 Å.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01246641
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  • 18
    Electronic Resource
    Electronic Resource
    Crystal and molecular structure of tricyclohexylphosphineethylidenenickel tricarbonyl: a reaction product of Ni(CO)4 and (C6H11)3P=(CH)CH3 (1972)
    Springer
    Journal of chemical crystallography 2 (1972), S. 271-279 
    Details
    ISSN: 1572-8854
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The structure of tricyclohexylphosphineethylidenenickel tricarbonyl, (C6H11)3P(CH)CH3.Ni(CO)3, has been determined by direct methods from 5858 automatic diffractometer data, and refined anisotropically to a finalR value of 0·094 (including hydrogen atoms). The crystals are monoclinic, space group P21/n, with a=10·670(1), b=13·879(2), c=16·222(2) Å, β=91·80(1)° and z=4. The main feature of the structure determination is the confirmation of the predicted arrangement of the ligand with its bonding to nickel via the secondary carbon of ylid-ligand. This carbon and the nickel atoms show approximate tetrahedral geometry. There seems to be no direct interaction between phosphorus and nickel (closest approach distance is 3·30 Å). The nickel-carbon distance (2·10 Å) is longer than any other Ni-C(sp3) distance previously reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01246644
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  • 19
    Electronic Resource
    Electronic Resource
    Crystal and molecular structure of triphenylphosphine (N,N-diethyldithiocarbamato)gold(I) (1972)
    Springer
    Journal of chemical crystallography 2 (1972), S. 7-15 
    Details
    ISSN: 1572-8854
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The crystal and molecular structure of triphenylphosphine (N,N-diethyldithio-carbamato) gold(I), (C6H5)3PAuSSCN(C2H5)2, has been determined by three-dimensional X-ray methods. The compound crystallizes in the monoclinic space groupP21/c witha = 13·547(1),b = 12·277(1),c = 14·013(1) Å, β = 90·81(1) ° andZ = 4. Three-dimensional intensity data were collected on an automatic diffracto-meter. Atomic parameters were refined by full-matrix least-squares methods to a conventionalR value of 0·04 for 2318 non-zero observed reflexions. In this complex the diethyldithiocarbamate moiety acts as a monodentate ligand, the double-bond distance being 1·68(1) Å and the bond involving the sulphur atom that is coordinated to the gold atom being 1·75(1) Å. The gold atom is linearly coordinated, the angle being 175·7(1) ° and the and distances being 2·338(3) and 2·251(3) Å, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01198363
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  • 20
    Electronic Resource
    Electronic Resource
    Crystal structure of 3-methylrhodaninecopper(I) iodide (1972)
    Springer
    Journal of chemical crystallography 2 (1972), S. 23-29 
    Details
    ISSN: 1572-8854
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The crystal structure of the copper(I) complex has been determined by a three-dimensional X-ray analysis. The monoclinic unit cell, space groupP21/c,a = 4·195(1),b = 15·581(2),c = 13·885(2) Å and β = 114·9(1) °, contains four formula-units. Intensities were collected on an automatic diffractometer. The structural parameters were refined by full-matrix least-squares methods to a conventionalR value of 0·07 for 1809 non-zero observed reflexions. In this complex, the copper atom is in tetrahedral coordination with three iodine atoms and the sulphur atom of the thiocarbonyl group of the ligand. The iodine atom is coordinated with three copper atoms. The distances are 2·683(2), 2·627(2) and 2·665(2) Å. The distances between neighbouring copper atoms are 3·008(3) and 2·960(3) Å and the corresponding angles are 68·44(6) and 68·02(6) °, suggesting weak copper-copper interactions in this complex.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01198365
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