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
URL:
http://dx.doi.org/10.1002/zaac.19976230816
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