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  • 1
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Aus Lösungen von CrCl2 und K4Fe(CN)6 fallen schwerlösliche Verbindungen aus; die Analyse weist auf die Existenz von K2CrFe(CN)6, Cr2Fe(CN)6 und K2Cr3[Fe(CN)6]2 hin. Die Komplexe haben ein hohes Adsorptionsvermögen für die Ionen, aus denen sie bestehen, insbesondere für Fe(CN)64- -Ionen. So adsorbiert Cr2Fe(CN)6 aus wäßriger Lösung etwa 1 Mol Fe(CN)64- bzw. 0.3 Mol Cr2+. Die Verbindungen hydrolysieren nur sehr wenig.
    Notes: Chromous ferrocyanide complexes have been prepared by mixing K4Fe(CN)6 and CrCl2 in the molar ratioes 1: 1, 1: 2 and 1: 4. The analysis showed the existence of K2CrFe(CN)6, Cr2Fe(CN)6 and K2Cr3[Fe(CN)6]2. The complexes are endowed with great adsorptive capacity for constituent ions and more so for ferrocyanide. A quantitative study showed that the ‘normal’ complex Cr2Fe(CN)6 adsorbs one mole of Fe(CN)64- and 0.3 mole of Cr++ in aqueous medium and 0.1 M of each in presence of 10% alcohol. The complexes have got very little hydrolytic tendency.
    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 301 (1959), S. 350-354 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Die Rektion zwischen CrCl2 und K4Fe(CN)6 ist mittels potentiometrischer, konduktometrischer und amperometrischer Titrationen untersucht worden. Mit den ersten beiden Methoden wurde die Bildung von K2CrFe(CN)6 und Cr2Fe(CN)6 nachgewiesen; die amperometrische Titration gab nur Hinweise für die Existenz der ersteren Verbindung. Durch die Adsorptionsfähigkeit der Verbindungen entstehen Fehler, die in Gegenwart von Alkohol geringer sind als in rein wäßrigem Medium.
    Notes: Potentiometric, conductometric and amperometric titrations have been carried out between CrCl2 and K4Fe(CN)6 with varying concentrations of the reagents in aqueous and aqeous-alcoholic media. While evidence for the formation of both K2CrFe(CN)6 and Cr2Fe(CN)6 was obtained from the first two methods, the amperometric titrations gave evidence only for the formation of K2CrFe(CN)6. From the discrepancies in the titre values (theoretical and determined), evidence for the role of adsorption in influencing the composition is obtained. The titre values approach the theoretical when measurements are done in presence of alcohol.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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