ISSN:
0044-2313
Keywords:
Oxoruthenates(VI), CsK5[RuO5][RuO4]
;
Preparation
;
single crystal structure
;
MAPLE calculation
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
On „Mixed-coordinated“ isolated Anions. 2. A New Type of Oxoruthenates(VI): CsK5Ru2O9 = CsK5[RuO5][RuO4]By heating of intimate mixtures of the oxides [KO1.1, CsO1.2, RuO2; K:Cs:Ru = 2.2:1:1; Ag-tube, 750°C, 34d] dark-green single crystals of CsK5Ru2O9 = CsK5[RuO5][RuO4] were obtained for the first time. Ru6+ shows two different polyhedra in this oxide (tetrahedron, trigonal bipyramid). Untill now Rb6[TeO5][TeO4] [1] next to „Mg4GeO6“ [3] and the isotypic high-pressure silicate [4] was the only examples known. The structure was determined by four-circle diffractometer data [Mo—Kα, 1824 from 1949 I0(hkl), SG: Pnma, R equals; 12.6%, Rw = 4.5%], parameters see text. Guinier-Simon data gave a = 1701.6(3), b = 827.6(1), c = 905.7(1) pm, Z = 4. The Madelung Part of Lattice Energy, MAPLE, Effective Coordination Numbers, ECoN, these calculated via Mean Fictive Ionic Radii, MEFIR, were calculated and discussed.
Notes:
Durch Tempern inniger Gemenge der binären Oxide [KO1,1, CsO1,2, RuO2; K:Cs:Ru = 2,2:1:1; Ag-Zylinder, 750°C, 34d] wurde erstmals CsK5Ru2O9 = CsK5[RuO5] [RuO4] in Form dunkelgrüner Einkristalle erhalten. In diesem Oxid tritt Ru6+ in zwei unterschiedlichen „Anionen“ auf (Tetraeder und trigonale Bipyramide). Vertreter dieser Art sind bei Halogeniden wie Chalkogeniden sehr rar. Bislang sind uns neben Rb6[TeO5] [TeO4] [1] nur „Mg4GeO6“ [3] und das isotype Silicat unter Hochdruck [4] bekannt. Die Strukturaufklärung erfolgte mittels Vierkreisdiffraktometer [Mo—Kα, 1824 von 1949 I0(hkl), RG:Pnma, R = 12,6%, Rw = 4.5%], Parameter siehe Text. Aus Guinier-Simon-Daten folgt a = 1701,6(3), b = 827,6(1), c = 905,7(1)pm, Z = 4. Der Madelunganteil der Gitterenergie, MAPLE, Effektive Koordinationszahlen, ECoN, diese über Mittlere Fiktive Ionenradien, MEFIR, wurden berechnet und diskutiert.
Additional Material:
7 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/zaac.19926170107
Permalink
