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  • Chemistry  (2)
  • GEOPHYSICS
  • 1990-1994
  • 1980-1984  (2)
  • 1960-1964
  • 1925-1929
  • 1980  (2)
Collection
Publisher
Years
  • 1990-1994
  • 1980-1984  (2)
  • 1960-1964
  • 1925-1929
Year
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 469 (1980), S. 179-187 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Structure Investigations on Pseudochalcogene Phosphorus Compounds. I. Crystal and Molecular Structure of Triphenylphosphonio DicyanomethylideThe title compound with the formula Ph3PC(CN)2 crystallizes in the monoclinic space group P21/c with cell parameters a = 948 pm, b = 1080 pm, c = 1756 pm, β = 104.5°. The structure has been solved by the heavy atom method. The refinement using anisotropic temperature factors for all non-hydrogen atoms yielded a final R value of 0.115. The molecular geometry including interatomic distances and bond angles is compared with literature data and discussed. The P—C bond lengths have been found to P—C(ylide) = 175.3 pm and P—C(phenyl) = 180.8 pm (average value).
    Notes: Die Verbindung Triphenylphosphonio-dicyanmethylid Ph3PC(CN)2 (1) kristallisiert in der monoklinen Raumgruppe P21/c, Gitterkonstanten: a = 948 pm, b = 1080 pm, c = 1756 pm, β = 104,5°. Die Struktur von 1 konnte nach der Schweratommethode gelöst und unter Verwendung anisotroper Temperaturparameter für die Nicht-Wasserstoffatome bis zu einem R-Wert von 0,115 verfeinert werden. Die Molekülgeometrie sowie die Bindungslängen und-winkel werden mit entsprechenden Literaturwerten verglichen und diskutiert. Für die Bindungslängen zwischen Phosphor und Kohlenstoff wurden die Werte P—C(Ylid) = 175,3 pm und P—C(Phenyl) = 180,8 pm (Mittelwert) gefunden.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 469 (1980), S. 188-196 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Structure Investigations on Pseudochalcogene Phosphorus Compounds. II. Crystal and Molecular Structure of Triphenylphosphonio CyanoamideTriphenylphosphonio cyanoamide Ph3PNCN crystallizes in the monoclinic space group P21/c with a = 957.5 pm, b = 1670.4 pm, c = 1126.7 pm, β = 121.28° and Z = 4. The structure has been determined by Patterson and Fourier techniques and refined by least squares methods to R = 0.047. The most interesting bond lengths and angles are P—N = 159.4 pm, P—C = 179.9pm (average value), N—C = 130.1 pm and 115,1 pm, P—N—C = 123.0° and N—C—N = 174.8°. The molecular structure for Ph3PNCN has been compared with those of other iminophosphoranes and discussed with respect to its relation to the series of triphenylphosphine pseudochalcogenides.
    Notes: Triphenylphosphonio-cyanamid Ph3PNCN kristallisiert monoklin in der Raumgruppe P21/c mit a = 957,5 pm, b = 1670,4 pm, c = 1126,7 pm, β = 121,28° und Z = 4. Dle Struktur wurde mit Hilfe von Patterson- und Fouriersynthesen bestimmt und nach der Methode der kleinsten Fehlerquadrate bis zu einem R-Wert von 0,047 verfeinert.Die wichtigsten Bindungslängen und -winkel sind P-N = 159,4 pm, P—C = 179,9 pm (Mittelwert), N—C = 130,1 pm bzw. 115,1 pm, P—N—C = 123,0° und N—C—N = 174,8°. Die Molekülstruktur von Ph3PNCN wird mit der anderer Iminophosphorane verglichen und die Stellung der Verbindung in der Reihe der Triphenylphosphin-pseudochalkogenide diskutiert.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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