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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 623 (1997), S. 65-68 
    ISSN: 0044-2313
    Keywords: Thallium(III) complex ; di(4,4′-phenyltriazenido)-phenylmethane ligand ; synthesis ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Crystal Structure of [Tl2(PhN3C6H4CH2C6H4N3Ph)3], a Dinuclear TlIII Complex with a Novel, Bridging Bistriazenido LigandTris[di(4,4′-phenyltriazenido)phenylmethane]-dithallium(III) is formed by the reaction of TlNO3 with di(4,4′-phenyltriazeno)phenylmethane in the presence of NaOH and air in an ethanol/H2O mixture. The compound is obtained as red, needlelike crystals from THF-hexane. It crystallizes monoclinic, space group I 2/a (a = 1375.2(5) pm, b = 2615(2) pm, c = 1957.0(8) pm, β = 93.49(3)°) with four dinuclear complexes in the unit cell. Each complex contains three doubly deprotonated bistriazenido ions (PhN3C6H4CH2C6H4N3Ph)2- and two Tl3+ ions. The Tl ions are each coordinated by three chelating triazenido groups resulting in a trigonal prismatic coordination of six N atoms. The Tl-N distances vary between 227 and 239 pm, all N-N distance of the triazenido groups are equal within standard deviations with a mean of 130 pm.
    Notes: Tris[di(4,4′-phenyltriazenido)phenylmethan]-di-thallium(III) entsteht durch Reaktion von TlNO3 mit Di(4,4′-phenyltriazeno)phenylmethan in Gegenwart von NaOH und Luft in einem Ethanol/H2O-Gemisch. Die Verbindung kann in Form roter, nudelförmiger Kristalle aus einem THF/Hexan-Gemisch erhalten werden. Sie kristallisiert monoklin in der Raumgruppe I 2/a mit den Gitterkonstanten a = 1375,2(5) pm, b = 2615(2) pm, c = 1957,0(8) pm, β = 93,49(3)° mit vier zweikernigen Komplexen in der Elementarzelle, von denen jeder aus drei doppelt deprotonierten Bistriazenido-Ionen (PhN3C6H4CH2C6H4N3Ph)2- und zwei Tl3+-Ionen aufgebaut ist. Die Tl-Ionen sind jeweils von drei Triazenidogruppen chelatförmig koordiniert, wodurch für die Kationen ein trigonal prismatisches Koordinationspolyeder aus sechs N-Atomen resultiert. Die Tl-N-Abstände variieren zwischen 227 und 239 pm, alle N-N-Abstände in den Triazenidogruppen sind innerhalb der Standardabweichungen gleich und betrugen im Mittel 130 pm.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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