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  • 1
    ISSN: 0044-2313
    Keywords: Thermolysis ; platinum ; palladium ; rhodium ; ruthenium ; chloro complexes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Mechanism of the Thermal Decomposition of Ammonium and Ammin Chloro Complexes of Ruthenium, Rhodium, Palladium and PlatinumThe thermolysis of noble metal compounds was investigated by a combination of independent physical (DTA/TG, high-temperature Guinier-Simon-technique) and preparative methods, characterization of the educts, intermediats and products by Guinier X-ray patterns and IR spectroscopy: (a)(NH4)2[PtCl6], (NH4)2[PtCl4], [Pt(NH3)4][PtCl4], [Pt(NH3)4]Cl2, and trans-[Pt(NH3)2Cl2];(b)(NH4)2[PdCl4], [Pd(NH3)4]Cl2, trans-[Pd(NH3)2Cl2], and [Pd(NH3)4][PdCl4];(c)(NH4)2[RhCl5(H2O)], (NH4)3[Rh2Cl9], K2[RhCl5(H2O)], and K2[RhCl5(NH3)];(d)(NH4)2[RuCl5(NH3)] and (NH4)4[Ru2Cl10O] .The most important step of the mechanism of the thermal decomposition is the „internal“ redox reaction between the noble metal cation and the nitrogen atom of the ammine ligand.
    Notes: Durch Kombination von DTA/TG, Hochtemperatur-Guinier-Simon-Aufnahmen und präparativen Methoden, sowie durch Charakterisierung der Edukte, Intermediate und Produkte mittels Röntgenaufnahmen nach dem Guinier-Verfahren und anhand von IR-Spektren, wurde der „thermische Abbau“ von Edelmetallverbindungen eingehend untersucht: (a)(NH4)2[PtCl6], (NH4)2[PtCl4], [Pt(NH3)4][PtCl4], [Pt(NH3)4]Cl2 und trans-[Pt(NH3)2Cl2];(b)(NH4)2[PdCl4], [Pd(NH3)4]Cl2, trans-[Pd(NH3)2Cl2] und [Pd(NH3)4][PdCl4];(c)(NH4)2[RhCl5(H2O)], (NH4)3[Rh2Cl9], K2[RhCl5(H2O)] und K2[RhCl5(NH3)];(d)(NH4)2[RuCl5(NH3)] und (NH4)4[Ru2Cl10O].Der entscheidende Schritt des Mechanismus des „thermischen Abbaus“ ist die „innere“ Reduktion des Edelmetallkations durch den Amminstickstoff.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
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