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  • Organic Chemistry  (6)
  • Clusters with Ru, trinuclear
  • Sulfonamidosilanes
  • Wiley-Blackwell  (6)
  • 1975-1979  (6)
Collection
Keywords
  • Organic Chemistry  (6)
  • Clusters with Ru, trinuclear
  • Sulfonamidosilanes
  • Chemistry  (6)
Publisher
  • Wiley-Blackwell  (6)
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Studies of Organometallic Compounds XVI.A series of studies of organometallic compounds pursued under the direction of Prof. A. Jacot-Guillarmod, in the same institute. The Crystal Structure of Di-μ-ethoxy-bis(dibenzylethoxy-titanium(IV)) (1975)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 58 (1975), S. 373-377 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The crystal structure of di-μ-ethoxy-bis(dibenzylethoxy-titanium(IV)), [(EtO)2Ti-(CH2Ph)2]2, has been determined from analysis of photographic X-ray data. The crystal system is monoclinic, a = 7.93(2), b = 15.99(2), c = 13.40(2) Å, β = 92.7(3)°, space group P21/c. The molecule is a dimer situated about a crystallographic center of symmetry. The two Ti atoms are joined by oxygen bridges. Each Ti atom is penta-coordinated in the form of a distorted trigonal bipyramid.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19750580206
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  • 2
    Electronic Resource
    Electronic Resource
    The Crystal Structure of Axillarine Hydrobromide Ethanol Solvate: A Pyrrolizidine Alkaloid (1976)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 59 (1976), S. 2168-2178 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The crystal structure of axillarine hydrobromide ethanol solvate has been determined from analysis of photographic X-ray data. The crystal system is orthorhombic, space group P212121, with unit cell dimensions a = 9.89, b = 11.23, c = 20.83 Å. The structure was determined by means of Patterson and Fourier syntheses, and refined by the method of least-squares to an R index of 9.4%.The structural features of axillarine are noted and compared with those of several other pyrrolizidine alkaloids. The NMR. chemical shift difference between the signals due to the non-equivalent C(9) protons in alkaloids derived from retronecine is also discussed.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19760590627
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  • 3
    Electronic Resource
    Electronic Resource
    The Crystal Structure of (1, 1′-ferrocenediyl)diphenylsilane (1976)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 59 (1976), S. 2402-2406 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The crystal structure of (1,1′-ferrocenediyl)diphenylsilane has been determined from analysis of photographic X-ray data. The crystal system is orthorhombic, a = 14.18(2), b = 12.54(2), c = 9.28(1) Å, space group Pnma with four formula units. The molecule has crystallographic m (Cs) symmetry with atoms Fe and Si lying in the mirror plane, which bisects the two phenyl groups. The planar cyclopentadienyl rings are bridged by a single silicon atom, and are tilted 19.2° with respect to one another. The Fe - C(Cp) distances vary from 2.01(1) to 2.11(1) Å. The bridging angle C(1) - Si - C(1′) is 99.1°, while the Si - C(sp2) bond lengths range from 1.86 to 1.88 Å. The exocyclic C(1) - Si bond makes an angle of 40° with respect to the plane of the cyclopentadienyl ring.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19760590714
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  • 4
    Electronic Resource
    Electronic Resource
    The Crystal Structure of (2 R, 7 S, 10 R)-2,10-diamino-5,5,7-trimethyl-4,8-diazaundecanenickel (II) perchlorate (1976)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 59 (1976), S. 981-986 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The structure of the title compound, a tricyclic Ni(II) tetra-amine complex has been determined from analysis of photographic X-ray data. The crystal system is orthorhombic, space group P212121, with unit cell dimensions a = 9.802, b = 8.998, c = 24.378 Å. The Ni atom is square planar coordinated. The six-membered chelate ring has a chair conformation. One of the five-membered chelate rings has a distorted gauche (λ) conformation with the methyl substituent in an equatorial position, the other has an unsymmetrical gauche (δ) conformation with the methyl substituent axial.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19760590402
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  • 5
    Electronic Resource
    Electronic Resource
    The gas-solid interface The Interaction of Argon, Xenon and Sulfur Hexafluoride with Rhombic Sulfur (1975)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 58 (1975), S. 2291-2294 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Further theoretical calculations have been carried out for the adsorption potentials of Ar on the (011) face of rhombic sulfur, and for Xe and SF6 on the (011) and (111) faces. By using the same sites for the three molecules and pair-potentials of the Lennard-Jones type, specific scaling factors were found. These are constant within 5-10%, for each adsorbate, and therefore the distribution curves of the adsorption potentials of simple molecules on crystalline sulfur are related in a simple way. The influence of the size of the molecule and the local geometry of the surface is also discussed.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19750580809
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  • 6
    Electronic Resource
    Electronic Resource
    The Interaction of Argon with Sulfur Surfaces. Experimental and calculated variations of the adsorption potential with surface coverage (1975)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 58 (1975), S. 194-198 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The adsorption potentials of argon on the (111), (001) and (110) planes of rhombic sulfur have been calculated for a total of 818 sites, using an intermolecular potential of the Lennard-Jones (6:12) type with the Kirkwood-Müller expression. Direct summation over the nearest 100-150 atoms of the solid was used. There is a good agreement between the experimental and the calculated values of the adsorption potential, as a function of the surface coverage.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19750580126
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