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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 623 (1997), S. 1273-1276 
    ISSN: 0044-2313
    Keywords: Strontium tetrahydroxozincate monohydrate ; crystal structure refinement ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Crystal Structure of SrZn(OH)4 · H2OColorless crystals of SrZn(OH)4 · H2O are obtained by electrochemical oxidation of Zn in a zinc/iron pair in an aqueous ammonia solution saturated with strontium hydroxide. The X-ray crystal structure determination was now successful including all hydrogen positions: P1, Z = 2, a = 6.244(1) Å, b = 6.3000(8) Å, c = 7.701(1) Å, α = 90.59(1)°, β = 112.56(2)°, γ = 108.66(2)°, N(F2o ≥ 3σF2o) = 1967, N(Var.) = 84, R/Rw = 0.020/0.024.In SrZn(OH)4 · H2O Zn2+ is tetrahedrally coordinated by four OH- -ions while Sr2+ has 6 OH- and one H2O as neighbours. The polyhedra around Sr2+ are connected to chains which are linked three-dimensionally by isolated tetrahedra [Zn(OH)4]. Hydrogen bonds between H2O as donor and OH- are characterized by raman spectroscopy.
    Notes: Die elektrochemische Oxidation von Zink in einem Zink/Eisen Paar führt in einer wäßrigen ammoniakalischen Lösung von Strontiumhydroxid zu farblosen Kristallen von SrZn(OH)4 · H2O. An ihnen wurde röntgenographisch die Struktur jetzt einschließlich aller H-Lagen bestimmt: P1, Z = 2, a = 6,244(1) Å, b = 6,3000(8) Å, c = 7,701(1) Å, α = 90,59(1)°, β = 112,56(2)°, γ = 108,66(2)°, Z(F2o ≥ 3σF2o) = 1967, Z(Var.) = 84, R/Rw = 0,020/0,024.In SrZn(OH)4 · H2O ist Zn2+ tetraedrisch von OH- und Sr2+ von 6 OH- und einem H2O umgeben. Die Polyeder um Sr2+ bilden Ketten. Sie sind über isolierte Tetraeder [Zn(OH)4] dreidimensional verknüpft. Wasserstoffbrückenbindungen von H2O als Donator zu OH- sind durch Ramanspektroskopische Daten belegt.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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