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  • 1965-1969  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Naturwissenschaften 52 (1965), S. 428-429 
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Naturwissenschaften 52 (1965), S. 493-493 
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 352 (1967), S. 11-23 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The tetrathiometallates Me2IWS4 (and Me2IMoS4) with MeI = NH4, K, Rb, Cs, Tl were prepared. These compounds were investigated by chemical, X-Ray, IR, and UV methods. With the exception of the cubic Tl compounds, the tetrathiotungstates (and tetrathiomolyb-dates) crystallize in the orthorhombic ß-K2SO4 type. For these compounds the “Struktur-chemische Volumenregel” is valid.The instable tungsten disulphide-bis(hydrogensulphide), S2W(SH)2 - in aqueous solution: tetrathiotungstic acid - has been prepared by interaction between (NH4)2WS4 and HCl in dimethylether at -78°C. The properties of S2W(SH)2 were described.The preparations of the more instable compounds S2Mo(SH)2 and SV(SH)3 were described.
    Notes: Die Tetrathiometallate Me2IWS4 (und Me2IMoS4) mit MeI = NH4, K, Rb, Cs, Tl wurden hergestellt und mit Hilfe chemischer, röntgenographischer, IR- und UV-spektroskopischer Methoden näher untersucht. Mit Ausnahme der kubischen Tl-Verbindungen kristallisieren die Tetrathiowolframate (und Tetrathiomolybdate) im rhombischen β-K2SO4-Typ. Für diese Verbindungen ist die strukturchemische Volumenregel gut erfüllt.Durch Umsetzung von Suspensionen von (NH4)2WS4 in Dimethyläther mit Lösungen von HCl in Dimethyläther bei -78°C konnte das instabile, dimethylätherhaltige Wolfram-disulfid-bis(hydrogensulfid) S2W(SH)2 (in wäßriger Lösung: Tetrathiowolframsäure) hergestellt werden. Die Eigenschaften des S2W(SH)2 werden mitgeteilt.Über Versuche zur Herstellung von S2Mo(SH)2 und SV(SH)3 wird berichtet.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 352 (1967), S. 246-251 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The behaviour of H2WS4 in aqueous solutions between 5 and 25 °C was investigated by means of conductivity measurements. The equivalent conductivities ΔoT of WS42- were determined, and the dissociation constants K1 and K2 were estimated.The Stokes radius of the WS42- ion, the radius of the hydrated ion and its diffusion coefficient were calculated.
    Notes: Mit Hilfe von Leitfähigkeitsmessungen wurde das Verhalten von H2WS4 in wäßrigen Lösungen zwischen 5° und 25°C untersucht. Die Temperaturabhängigkeit der Äquivalent-leitfähigkeit des WS42--Ions läßt sich durch die Gleichung (in cm2 · g-Äqu.-1 · Ω-1; T in °K) \documentclass{article}\pagestyle{empty}\begin{document}$$ \Lambda _0 ^{\rm T} (1/2\,{\rm WS}_{\rm 4} ^{2 -}) = - 459,6 + 1,85 \cdot {\rm T} $$\end{document} beschreiben. Die beiden Dissoziationskonstanten des H2WS4 konnten größenordnungs-mäßig zu K1 = 10+3(±1) und K2 = 10-2(±2) abgeschätzt werden.Für das WS42- -Ions wurden bei 25 °C der Stokessche Radius zu rs = 2,01 Å, der Radius des hydratisierten Ions zu rhydr. = 3,65 Å und der Grenzwert des Diffusionskoeffizienten zu Do = 1,23 · 10-5 cm2 · sec-1 berechnet.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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