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  • Inorganic Chemistry  (2)
  • ASTRONOMY  (1)
  • 2010-2014
  • 1975-1979  (3)
  • 1960-1964
  • 1979  (3)
Collection
Keywords
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  • 2010-2014
  • 1975-1979  (3)
  • 1960-1964
Year
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 452 (1979), S. 112-122 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Nucleophilic Degradation of Tris(pentasulfido)platinum(IV), [Pt(S5)3]2-, and Bis(pentasulfido)platinum(II), [Pt(S5)2]2-The behaviour of [Pt(S5)3]2-, (I), towards sulfite, arsenite, sulfide, hydroxide, and triphenylphosphine has been studied qualitatively and quantitatively. With stoichiometric amounts of nucleophile one ring is degraded; the reaction product [Pt(S5)2]2-, (II), can be isolated. With excess of nucleophile all sulfur atoms are taken off from the platinum; with triphenylphosphine, however, (PPh3)2PtS4, (III), is formed. A mechanistic interpretation of the course of the reaction is given and supported by kinetic studies.
    Notes: Das Verhalten von [Pt(S5)3]2-, (I), gegenüber Sulfit, Arsenit, Sulfid, Hydroxid und Triphenylphosphin wird qualitativ und quantitativ untersucht. Mit stöchiometrischen Mengen an Nukleophil wird ein Ring abgebaut; als Reaktionsprodukt kann [Pt(S5)2]2-, (II), isoliert werden. Mit Überschuß an Nukleophil werden alle Schwefelatome vom Platin abgelöst; mit Triphenylphosphin entsteht dagegen (PPh3)2PtS4, (III). Der Reaktionsablauf wird mechanistisch gedeutet und durch kinetische Untersuchungen erhärtet.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 454 (1979), S. 160-166 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Addition Compounds between Antimony(III)-Halides and 1,4-DithiacycloheptaneSbCl3, SbBr3, and SbI3 do form the addition compounds SbCl3 · 1,4-Dithiacycloheptane, SbBr3 · 1,4-Dithiaheptane and 2 SbI3 · 1,4-Dithiacycloheptane from benzene solutions. The new compounds are only stable in the solid form. FIR spectra of the SbCl3 and SbBr3 complexes are recorded as well as the X-ray structure of the SbCl3 compound.
    Notes: Aus benzolischen Lösungen von SbCl3, SbBr3 und SbI3 bilden sich mit 1,4-Dithiacycloheptan die nur in fester Form existenzfähigen Verbindungen SbCl3 · 1,4-Dithiacycloheptan, SbBr3 · 1,4-Dithiacycloheptan und 2 SbI3 · 1,4-Dithiacycloheptan. Die FIR-Spektren der SbCl3- und SbBr3-Addukte sowie die Röntgenstrukturanalyse der SbCl3-Verbindung werden mitgeteilt.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Publication Date: 2019-06-27
    Description: IUE observations indicate that the spectrum of 3C 273 is similar to that of other large-redshift quasars. There is a large excess of flux in the range 2400 A to 5300 A, which encompasses the Balmer jump region but which does not appear to be explainable by Balmer emission. The intensity ratio of Lyman-alpha to H-beta is 5.5, in agreement with other measures and a factor 6 smaller than the recombination value. The only absorption lines in the spectrum are due to our Galaxy. There is marginal evidence for a depression of the continuum shortward of the Lyman-alpha emission line, but the errors are too large to warrant any conclusion that 3C 273 has a rich absorption-line spectrum such as that seen in large-redshift quasars. The absence of emission and absorption lines of Fe II leads to the conclusion that resonance fluorescence probably produces the visual Fe II emission lines.
    Keywords: ASTRONOMY
    Type: Astrophysical Journal; vol. 230
    Format: text
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