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  • Aluminum  (1)
  • DFT calculations  (1)
  • Festkörperstrukturen  (1)
  • Galliumverbindungen  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 1999 (1999), S. 1531-1535 
    ISSN: 1434-1948
    Keywords: SiCl4 Combustion ; OSiCl2 ; Matrix isolation ; Thermodynamic data ; DFT calculations ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: During the technical important combustion of SiCl4 with oxygen [SiCl4(g) + O2(g) = SiO2(s) + 2·Cl2(g)] many intermediates have been detected in the past. However, the presence of the primary species O=SiCl2 has been discussed controversially until today. With the help of matrix isolation technique we have now been successful to monitor O=SiCl2 via its IR spectrum. With the help of quantum chemical calculations the thermodynamic data have been calculated first. On this basis it was possible to find the optimal conditions to trap OSiCl2 from the high-temperature equilibrium. Furthermore it could be shown via IR spectroscopy and quantum chemical calculations, that the radical OSiCl does not play a significant role within this combustion process.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 108 (1996), S. 141-161 
    ISSN: 0044-8249
    Keywords: Aluminiumverbindungen ; Galliumverbindungen ; Matrixisolierung ; Subvalente Verbindungen ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Bereits Ende des letzten Jahrhunderts gab es die ersten Hinweise auf die Existenz von Al1-Halogeniden. Aber erst durch die grundlegenden Arbeiten von W. Klemm, dessen Geburtstag sich am 6. Januar 1996 zum 100. Mal jährte, wurden detaillierte spektroskopische und anwendungstechnische Untersuchungen möglich. Nachdem seit Ende der siebziger Jahre auch die Reaktivitäten von AlX- und GaX-Spezies in festen Edelgasen durch zahlreiche Beispiele nachgewiesen wurden, gelang es in den letzten Jahren, Spezies mit formal einwertigem Al und Ga im präparativen Maßstab darzustellen. Außer den ersten Halogeniden konnten dabei auch metallorganische Verbindungen mit Metall-Metall-Bindungen isoliert und bezüglich ihrer chemischen Eigenschaften untersucht werden. Die grundlegende Bedeutung solcher Spezies ist in dieser Zeitschrift unter anderem in zwei Highlights beschrieben worden, in denen exemplarisch experimentelle und theoretische Aspekte beleuchtet sowie Parallelen und Unterschiede zur Borchemie aufgezeigt wurden. In dem vorliegenden Übersichtsartikel wird zum einen die chronologische Entwicklung dieses Forschungsgebiets während der letzten Jahre dargelegt, und zum anderen wird versucht, die experimentellen Ergebnisse hinsichtlich Struktur, Thermodynamik und Reaktivität sowohl mit quantenchemischen Rechnungen als auch durch vergleichende Betrachtungen einzuordnen.
    Additional Material: 21 Ill.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 0044-8249
    Keywords: Festkörperstrukturen ; Gallium ; Niedervalente ; Verbindungen ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 35 (1996), S. 129-149 
    ISSN: 0570-0833
    Keywords: aluminum compounds ; gallium compounds ; matrix isolation ; subvalent compounds ; Aluminum ; Gallium ; Subvalent compounds ; Matrix isolation ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: By the end of the last century there were already the first indications of the possible existence of Al1 halides. However, it was only through the pioneering works of W. Klemm, who would have celebrated his 100th birthday on January 6, 1996, that detailed spectroscopic investigations became possible. Since the end of the 1970s the reactivity of AlX and GaX species in solid noble gases has been confirmed by numerous examples. In recent years formally monovalent Al and Ga species have been successfully synthesized on a preparative scale. In addition to the first halides, organometallic compounds with metal-metal bonds have been isolated and investigated with regard to their chemical properties. The fundamental importance of such species has been documented in this journal among others in the form of two highlight articles in which experimental and theoretical aspects have been examined with examples, and parallels and differences with respect to boron chemistry have been illustrated. This review is intended to give an account of the chronological development of this research area over the last few years, but an attempt is also made to categorize the experimental results achieved not only with respect to structure, thermodynamics, and reactivity, but also with the aid of quantum chemical calculations and by comparative considerations.
    Additional Material: 21 Ill.
    Type of Medium: Electronic Resource
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