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  • 1993  (1)
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  • 1990-1994  (1)
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    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 619 (1993), S. 1389-1392 
    ISSN: 0044-2313
    Keywords: [Y9C4O]I8 ; electronic structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Electronic Structure of [Y9C4O]I8The new [Y9C4O]I8 structure exhibits striking similarities with layered structures of the well-known rare-earth metal carbide halides [M2C]X2 and [M2C2]X2 (M = rare-earth metal, X = halide) which already have been studied concerning their electronic structures and conductivities. In contrast to the last compounds, [Y9C4O]I8 formally contains one extra electron. This electron appears to be delocalized in various metallic orbitals. The oxygen atoms which are located in the bent sections in the metal double layers as well as the halide double layers in the structure are considered to act as barriers for electronic mobility. Therefore a one-dimensional metallic conductivity is expected to be dominant.
    Notes: Die neue Struktur von [Y9C4O]I8 zeigt eine auffallende Verwandtschaft zu den seit längerer Zeit bekannten Schichtstrukturen der Selten-Erd-Metall-Carbidhalogenide [M2C]X2 sowie [M2C2]X2 (M = Selten-Erd-Metall, X = Halogen), deren elektronische Strukturen und Leitfähigkeitseigenschaften bereits intensiv untersucht wurden. Im Gegensatz zu diesen Verbindungen besitzt [Y9C4O]I8 formal ein zusätzliches Elektron. Dieses Elektron ist über unterschiedliche Metallorbitale delokalisiert. Dabei stellen die Sauerstoffatome in den “Knickstellen” der Metallschichten sowie die Halogendoppelschichten in der Struktur Barrieren für die Elektronenbeweglichkeit dar, weshalb für die Titelverbindung eine eindimensionale metallische Leitfähigkeit dominieren sollte.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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