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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 87 (1980), S. 87-94 
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Es wurden Chelatpolymere von Cu(II), Ni(I1) und Co(I1) mit 5,5′-Methylen-bis(salicylaldehydoxim) hergestellt. Die quadratische planare Struktur der Komplexe ergab sich aus IR- und elektronischen Spektren in Verbindung mit Messungen der magnetischen Suszeptibilität. Die Reihenfolge der thermischen Stabilität der Chelate wurde aus TG-Thermogrammen ermittelt und ergab \documentclass{article}\pagestyle{empty}\begin{document}$ {\rm Co (II) 〉 Ni(II) 〉 Cu(II)}. $\end{document} Wie festgestellt wurde, erhöhen die Co(II)- und Ni(II)-Chelate ihre Koordinationszahl durch Reaktion mit Pyridin, das oberhalb und unterhalb des planaren Quadrats koordiniert wird. Der entstehende Komplex hat oktaedrische Struktur. Zur Bestimmung der Feldparameter wurde die Ligandenfeldtheorie benutzt.
    Notes: Chelate polymers of Cu(II), Ni(II) and Co(II) with bis-oxime of 5,5′-methylene bis(salicylaldehyde) have been prepared. The square-planar structure of the complexes was determined on the basis of infrared and electronic spectral measurements in conjunction with magnetic susceptibility measurements. The thermal stability of the chelates, obtained from the TG thermograms has the following order: \documentclass{article}\pagestyle{empty}\begin{document}$ {\rm Co (II) 〉 Ni(II) 〉 Cu(II)}. $\end{document} Co(II) and Ni(II) chelates are found to increase their coordination number by interaction with pyridine at right angles to the plane of the parent molecule. The resulting complex is found to have octahedral structure. The ligand-field and nephelauxetic parameters have been determined from the spectra, using ligand-field theory of spin-allowed transitions which are found consistent with six-coordinate structure for these adducts.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
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