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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 401 (1973), S. 263-273 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On Surface Compounds of Transition Metals. VI. The Reaction of Surface Chromium(II) with AmmoniaThe complex formation ability of coordinatively unsaturated surface Cr(II) was studied by reflectance spectroscopy and thermogravimetric methods. At temperatures ≦100°C ammonia is bonded under formation of a violet complex with the stoichiometry Cr(II)/NH3 = 1:2.At temperatures ≦50°C and 1 atm NH3 a second, deep blue compound is formed to which we ascribe the stoichiometry 1:4. Here the thermogravimetric measurements cannot be interpreted without additional assumptions (adsorption model!) leading to a range of uncertainty in the result.
    Notes: Die Komplexbildung von koordinativ ungesättigtem Oberflächen-Chrom(II) mit NH3 wurde mittels Reflexionsspektroskopie und Thermogravimetrie untersucht. Bei Temperaturen ≦100°C wird NH3 unter Bildung eines violetten Komplexes der Stöchiometrie Cr(II)/H3 = 1:2 gebunden.Bei Temperaturen ≦50°C und 1 atm. NH3 bildet sich eine NH3-reichere, tiefblaue Verbindung, der die Stöchiometrie 1:4 zugeordnet wird. Die thermogravimetrischen Messungen können hier nicht ohne zusätzliche Annahmen (Adsorptionsmodell!) ausgewertet werden, wodurch eine größere Unsicherheit des Resultats verursacht wird.
    Type of Medium: Electronic Resource
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