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  • 1975-1979  (3)
  • 1930-1934
  • 1978  (3)
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  • 1975-1979  (3)
  • 1930-1934
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  • 1
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: On the Chemistry of Acylthioureas. III. Synthesis of 1,3,5-Thiadiazine-2-thiones by the Reaction of Acylisothiocyanates with AminesIn course of synthesis of benzoyl-thioureas from benzoyl-isothiocyanate and sec. amines some new 6-amino-4-phenyl-1,3,5-thiadiazine-2-thione 5 are prepared and characterized chemically and spectroscopically.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 445 (1978), S. 13-19 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Calorimetric Investigations of Adduct Formation of Pyridine with Nickel(II) Chelates of Monothio-β-diketone Type LigandsThe thermodynamic functions ΔH°, ΔG°, and ΔS° of adduct formation of pyridine with nickel(II) chelates of monothio-β-diketones, N-disubstituted N′-benzoylthioureas and -selenoureas and N-acylthiobenzamide ligands in benzene have been obtained from calorimetric measurements. The higher stability of the pyridine adducts of the Ni(II) chelates of the azaanalogous ligands of monothio-β-diketones as compared to the Ni(II) chelates of the parent ligands is due to the higher enthalpy values of the former.
    Notes: Aus calorimetrisch bestimmten Reaktionswärmen wurden die thermodynamischen Funktionen ΔG°, ΔH° und ΔS° für die Pyridinanlagerung an Nickel(II)-Chelate mit Monothio-β-diketonen, N-disubstituierten N′-Benzoylthioharnstoffen und -selenoharnstoffen sowie N-Acylthiobenzamiden als Liganden in Benzol bei 298,15 K ermittelt. Der Vergleich der Daten zeigt, daß die größere Stabilität der Pyridinaddukte der azaanalogen Nickelchelate durch größere ΔH° Beträge hervorgerufen wird.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 446 (1978), S. 216-226 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Determination of the Catalytic Activity of N-Benzoylthiourea Derivatives in the Iodine-Azide Reaction in a System of Competitive ReactionsIn the determination of catalytic activity of sulfur containing compounds using the azide/iodine reaction the catalyst is oxidised to an inactive form in a side reaction with iodine. Using a system of competitive reactions (reaction between ascorbic acid and iodine), in which the concentration of iodine is always kept very low during the measurement it is possible to overcome this difficulty. In such a system sulfide is catalytically active during a considerable part of the measurement period. With this method it is possible to recognize differences in the structure - action behaviour of the investigated catalysts (N-Benzoylthioureas) and to correlate the catalytic activity with the constitution. For comparison the qualitative azide/iodine test and a method to check photographic sensitivity was chosen.
    Notes: Die Bestimmung der Katalytischen Aktivität schwefelhaltiger Verbindungen mit Hilfe der Jod-Azid-Reaktion wird durch die in einer Nebenreaktion erfolgende Oxydation der Katalysatoren durch überschüssiges Jod stark gestört. Durch Einbeziehung einer Konkurrenzreaktion zwischen Ascorbinsäure und Jod kann die freie Jodkonzentration im Reaktionsgemisch sehr niedrig gehalten werden. so daß eine Desaktivierung der untersuchten Katalysatoren (N-Benzoylthioharnstoffderivate) kaum erfolgt. Dadurch ist es möglich, Unterschiede im Struktur/Wirkungsverhalten der einzelnen Verbindungen zu erkennen und die katalytische Aktivität mit der Konstitution zu korrelieren. Zum Vergleich werden der qualitative Jod-Azid-Test und ein sensitometrisches Prüfverfahren herangezogen.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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