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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 339 (1965), S. 214-219 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Chelate compounds of N,N′-bis-(benzal)ethylenediimine and N,N′-bis-(thiophene-2-al)-ethylenediimine with the B metal ions CuI, CuII, AgI, ZnII, HgII and FeII have been prepared from methanolic solution as perchlorates or nitrates. They are of the 1:2 type. Systems containing chloride ions yield 1:1 chelates. The yellow coloured CuI compounds are sparingly soluble in methanol and water, resp., and comparatively stable against hydrolytic oxidation. Rate constants for the pseudo first-order overall hydrolytic cleavage of the free and co-ordinated ligands have been determined by a pH-stat titrimetric prodedure at 20° and 8 weight-% methanol. The influence caused by varying the metal ion is discussed.
    Notes: N,N′-Bis-(Benzal)äthylendiimin und N,N′-Bis-(Thiophen-2-al)äthylendiimin liefern mit den B-Metallionen CuI, CuII, AgI, ZnII, HgII sowie FeII 1:2-Chelate, die als Perchlorate bzw. Nitrate aus Methanol kristallin isoliert werden. Aus chloridhaltigen Systemen resultieren 1:1-Komplexe. Die gelbgefärbten CuI-Chelate sind in Methanol und Wasser sehr schwerlöslich und relativ beständig gegen hydrolytische Oxydation. Die Hydrolysegeschwindigkeit der koordinierten Liganden wird pH-stat titrimetrisch bei 20° in 8 Gew.-% Methanol gemessen. Die Bruttoreaktionen verlaufen nach pseudo-erster Ordnung. Der unterschiedliche Einfluß der Metallionen auf die Hydrolysegeschwindigkeit wird diskutiert.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
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