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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: The equilibria in Cu(II) ion and DL-threonine (ThrH2) solutions have been studied. It was found that in the pH interval from 2 to 13.5 the following compounds can exist: CuThrH+, Cu(ThrH)20, Cu(Thr)(ThrH)- and Cu(Thr)22-. The stoichiometric instability constants of the first two compounds were determined by the spectrophotometric method and by a combination of spectrophotometric and potentiometric methods. In addition, it was established in the same way that the Cu(ThrH)20 complex behaves like a weak dibasic acid, whose ionisation constants were determined too. Finally, the absorptionspectra of the above complex compounds are given.
    Notes: Die in der Lösung von Cu(II)-Ionen und DL-Threonin (ThrH2) vorliegenden Gleichgewichte wurden studiert. Im pH-Interval von 2 bis 13,5 können folgende Verbindungen zugegen sein: CuThrH+, Cu(ThrH)20, Cu(Thr)(ThrH)- und Cu(Thr)22-. Mittels spektralphotometrischer und kombinierter spektralphotometrischer und potentiometrischer Methode wurden die stöchiometrischen Dissoziationskonstanten der ersten zwei Komplexe wie auch beide Säurekonstanten des zweiten Komplexes bestimmt. Die Absorptionsspektren der genannten Verbindungen werden dargestellt.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
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