Journal
ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES
Volume 61, Issue 7, Pages 912-915Publisher
WALTER DE GRUYTER GMBH
DOI: 10.1515/znb-2006-0720
Keywords
platinum; sulfates; cluster; crystal structure; solvothermal reactions
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Single crystals Of Cs2K2[Pt12O8(SO4)(12)] (R (3) over bar, Z = 3, a = 1198.9(3), c = 2768.9(9) pm, R-all = 0.1154) were obtained by the reaction Of Cs-2[Pt(NO2)(4)], K-2[Pt(NO2)(4)] and conc. sulfuric acid at 400 degrees C in a sealed glass ampoule. The compound contains the cluster anion [Pt12O8(SO4)(12)](4-). It consists Of Six Pt-2(6+) dumbbell shaped cations that are linked by eight oxide ions and twelve sulfate anions to form a distorted Pt-12 icosahedron. The arrangement of the cluster anions in the crystal structure provides two voids for the cations. The larger one is occupied by the Cs+ ions while the K+ ions reside in the smaller one. For the Cs+ ions the coordination number is 15 while the K+ ions have a coordination number of 13.
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