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  • 1
    Electronic Resource
    Electronic Resource
    Thermal studies of some mixed complexes of Mn(II) with picrate and nitrogen donors (1991)
    Springer
    Journal of thermal analysis and calorimetry 37 (1991), S. 2473-2481 
    Details
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Mittels Thermogravimetrie wurde die thermische Zersetzung von neun Mn(II)-Mischligandenkomplexen mit Pikrat und monooder dizahnigen Stickstoffliganden untersucht. Die Kinetik der Zersetzung wurde mittels der Coats-Redfern und der Horowitz-Metzger-Gleichungen untersucht; in jedem Falle handelt es sich um eine Kinetik erster Ordnung. Die Aktivierungsenergie und andere kinetische Parameter wurden berechnet. Der Mechanismus der Zersetzungsreaktion zeigt für alle untersuchten Verbindungen einen ähnlichen Charakter. Anhand der TG-Kurven wurde beobachtet, daß bei der Zersetzung der Komplexe durch Substitution des Pikrates in die inneren Koordinationssphäre Zwischenprodukte mit der Koordinationszahl sechs entstehen. Diese Intermediäre zersetzen sich über Mn(II)-pikrat zu Mn2O3.
    Notes: Abstract The thermal decompositions of nine mixed ligand complexes of Mn(II) containing picrate and mono- or bidentate nitrogen ligands were studied by thermogravimetry. The kinetics of decomposition were examined by using the Coats-Redfern and Horowitz-Metzger equations; the decomposition was in all cases of the first order. The activation energies and other kinetic parameters were computed. The decomposition mechanisms exhibited a similar character for all the studied compounds. It was observed from the TG curves that the complexes decomposed to give six-coordinate intermediates, formed from substitution of the picrate into the inner coordination sphere. These intermediates decomposed to Mn(II) picrate and finally to Mn2O3.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01912794
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  • 2
    Electronic Resource
    Electronic Resource
    Lewis acidity of coordinatively unsaturated bis(2-mercaptobenzothiazolato)nickel(II) towards azoles and morpholine (1991)
    Springer
    Journal of thermal analysis and calorimetry 37 (1991), S. 627-636 
    Details
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Reaktion von Bis(2-mercaptobenzothiazolato)nickel(II) mit einigen Azolen und Morpholin liefert die entsprechenden Mischligandenkomplexe. Die untersuchten Azole waren 2-Aminothiazol, Benzothiazol, Benzoxazol, 2-Methylbenzoxazol und 2-Mercaptobenzoxazol. Die Bildung neuer Verbindungen wurde anhand von Spektren festgestellt. Es wurde die thermische Zersetzung von einigen dieser Verbindungen sowie zum Vergleich auch von einigen in der Literatur beschriebenen verwandten Verbindungen untersucht. Anhand der Coats-Redfern- und der Horowitz-Metzger-Gleichung wurden die Aktivierungsenergien und andere kinetische Parameter errechnet.
    Notes: Abstract The reactions of bis(2-mercaptobenzothiazolato)nickel(H) with some azoles and morpholine afforded the corresponding mixed ligand complexes. The studied azoles were 2-aminothiazole, benzothiazole, benzoxazole, 2-methylbenzoxazole and 2-mercapto-benzoxazole. The formation of new compounds was confirmed from the spectral data. The thermal decompositions of the compounds together with some related compounds reported in the literature, for comparison, were studied. The activation energies and other kinetic parameters were calculated from the Coats-Redfern and Horowitz-Metzger equations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01913114
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  • 3
    Electronic Resource
    Electronic Resource
    Mixed Ligand Complexes of 5-arylazo-8-hydroxyquinoline and α-amino Acids with Co(II), Ni(II) and Cu(II) (2000)
    Springer
    Journal of thermal analysis and calorimetry 62 (2000), S. 665-679 
    Details
    ISSN: 1572-8943
    Keywords: α-amino acids ; 5-arylazo-8-hydroxyquinoline ; characterization ; mixed ligand complexes ; thermal analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Ten mixed ligand complexes of the type [M(X-QA)(aa)] and [Ni(X-QA)2(Haa)(H2O)],where X-HQA=5-arylazo-8-hydroxyquinoline derivatives, M=Co(II) orCu(II) and Haa=glycine (gly), alanine (ala) or methionine (met), have been prepared. The complexes have been characterized by elemental analysis, IR and electron spectra and thermal analysis. A tetrahedral structure has been proposed for the cobalt(II) and copper(II) complexes with bidentate coordination of amino acids. The nickel(II) complexes have been assigned an octahedral structure with the amino acids acting as monodentate ligands. The thermal behaviour of the complexes has been studied before and after γ-irradiation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1026761007006
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