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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 620 (1994), S. 1046-1050 
    ISSN: 0044-2313
    Keywords: Trithiotellurate ; Bispentasulfidotellurate(II) ; Preparation ; Crystal Structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Crystal Structures of (PPh4)2[TeS3] · 2 CH3CN and (PPh4)2[Te(S5)2](PPh4)2[TeS3] · 2 CH3CN was obtained by the reaction of PPh4Cl, Na2S4 and Te in acetonitrile. With sulfur it reacts yielding (PPh4)2[Te(S5)2]. The crystal structures of both products were determined by X-ray diffraction. (PPh4)2[TeS3] · 2 CH3CN: triclinic, space group P1, Z = 2, R = 0.041 for 4 629 reflexions; it contains trigonal-pyramidal [TeS3]2- ions with an average Te—S bond length of 233 pm. (PPh3)2[Te(S5)2]: monoclinic, P21/n, Z = 2, R = 0.037 for 2 341 reflexions. In the [Te(S5)2]2- ion the tellurium atom has a nearly square coordination by four S atoms. Along with the Te atoms each of the two S5 groups forms a ring with chair conformation.
    Notes: Bei der Reaktion von PPh4Cl, Na2S4 und Te in Acetonitril entsteht (PPh4)2[TeS3] · 2 CH3CN. Mit Schwefel wurde daraus (PPh4)2[Te(S5)2] erhalten. Von beiden Produkten wurden die Kristallstrukturen mittels Röntgenbeugung bestimmt. (PPh4)2[TeS3] · 2 CH4CN: triklin, Raumgruppe P1, Z = 2, R = 4,1% für 4 629 Reflexe; es enthält trigonal-pyramidale [TeS3]2--Ionen mit einer mittleren Te—S-Bindungslänge von 233 pm. (PPh4)2[Te(S5)2]: monoklin, P21/n, Z = 2, R = 3,7% für 2 341 Reflexe. Im [Te(S5)2]2 -Ion ist das Telluratom annähernd quadratisch von vier S-Atomen koordiniert. Jede der beiden S5-Gruppen bildet zusammen mit dem Te-Atom einen Ring in Sesselkonformation.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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