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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 620 (1994), S. 1081-1086 
    ISSN: 0044-2313
    Keywords: K2Mn[P2S6], Hexathiodiphosphate(IV) ; Hexathiohypodiphosphate ; Crystal Structure ; Vibrational Spectrum ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Kristallstruktur und Schwingungsspektrum von Dikaliummangan(II)-hexathiodiphosphat(IV), K2Mn[P2S6]K2Mn[P2S6] wurde aus den Elementen bei 1 173 K in evakuierten Quarzampullen dargestellt. Die Verbindung bildet transparente, hellbraune, luft- und feuchtigkeits-beständige Kristalle. Die Kristallstruktur von K2Mn[P2S6] (monoklin; Raumgruppe P21/n, No. 14; a = 6,1966(9), b = 12,133(2), c = 7,424(1) Å, β = 101,52(1)°; Z = 2; Pearson-Code mP22) enthält Säulen flächenverknüpfter S6-Polyeder (verzerrte Oktaeder und trigonale Antiprismen), die parallel zur a-Achse verlaufen und durch K+ (KZ 10; d(K—S) = 3,23-3,92 Å) miteinander verbunden sind. Die S6-Polyeder der Säulen werden alternierend durch Mn (in Oktaedern mit d̄(Mn—S) = 2,647 Å) bzw. P2-Paare (in trigonalen Antiprismen) zentriert, die zur a-Achse um 73,1° geneigt sind. Die Bindungslängen in den Hexathiodiphosphat(IV)-Anionen [P2S6]4- mit angenäherter 3 2/m-D3d-Symmetrie betragen d̄(P—P) = 2,211 und d̄(P—S) = 2,018 Å. K2Mn[P2S6] ist isotyp zu K2Fe[P2S6] und der zweite Vertreter dieses Strukturtyps. Die beobachteten Fundamentalschwingungen von K2Mn[P2S6] stehen im Einklang mit der Faktorgruppenanalyse und werden auf der Basis von [P2S6]4--Einheiten unter Berücksichtigung der Abweichung von der D3d-Symmetrie zugeordnet.
    Notes: K2Mn[P2S6] was synthesized from the elements in sealed quartz ampoules at 1 173 K. The compound forms transparent light brown crystals, stable against air and moisture. The crystal structure (monoclinic; space group P21/n, No. 14; a = 6.1966(9), b = 12.133(2), c = 7.424(1) Å, β = 101.52(1)°, Z = 2; Pearson code mP22) consists of columns of face-sharing S6 polyhedra (distorted octahedra and trigonal antiprisms) parallel to the a axis, interconnected by inserted K+ (CN 10; d(K—S) = 3.23-3.92 Å). The S6 polyhedra of the columns are centered alternately by Mn (in octahedra with d̄(Mn—S) = 2.647 Å) and P2 pairs (in trigonal antiprisms) which are inclined to the a axis by 73.1°. The bond lengths in the resulting hexathiodiphosphate(IV) anions, [P2S6]4-, with approximate 3 2/m-D3d symmetry, are d(P—P) = 2.211 Å and d(P—S) = 2.018 Å. K2Mn[P2S6] is isotypic to K2Fe[P2S6], being the second member of this structure type. The internal modes of the observed Raman and FIR/IR spectra of K2Mn[P2S6] are in accord with the factor group analysis, and the fundamentals are assigned on the basis of [P2S6]4- units, taking into account the deviation of the D3d symmetry.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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