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Double salt crystal structure of hexasodium hemiundecahydrogen α-hexamolybdoplatinate(IV) heminonahydrogen α-hexamolybdoplatinate(IV) nonacosahydrate: dihydrogen disordered-mixture double salt
The title double salt containing two distinct, differently protonated hexamolybdoplatinate(IV) polyanions, Na(6)[H(5.5) α-PtMo(6)O(24)][H(4.5) α-PtMo(6)O(24)]·29H(2)O, has been synthesized by a hydrothermal reaction at ca pH 1.80. The positions of the H atoms in the polyanions were established fro...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
International Union of Crystallography
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4647359/ https://www.ncbi.nlm.nih.gov/pubmed/26594418 http://dx.doi.org/10.1107/S2056989015017703 |
Sumario: | The title double salt containing two distinct, differently protonated hexamolybdoplatinate(IV) polyanions, Na(6)[H(5.5) α-PtMo(6)O(24)][H(4.5) α-PtMo(6)O(24)]·29H(2)O, has been synthesized by a hydrothermal reaction at ca pH 1.80. The positions of the H atoms in the polyanions were established from difference Fourier maps and confirmed by the interpolyanion hydrogen bonds, bond-distance elongation, and bond-valence sum (BVS) calculations. The fractional numbers of H atoms in each polyanion are required for charge balance and in order to avoid unrealistically short H⋯H distances in the interpolyanion hydrogen bonds. Considering the disorder, the refined formula of the title polyanion, {[H(5.5) α-PtMo(6)O(24)]; polyanion (A) and [H(4.5) α-PtMo(6)O(24)]; polyanion (B)}(6−), can be rewritten as a set of real formula, viz. {[H(6) α-PtMo(6)O(24)]; polyanion (A). [H(4) α-PtMo(6)O(24)]; polyanion (B)}(6−) and {[H(5) α-PtMo(6)O(24)]; polyanion (A). [H(5) α-PtMo(6)O(24)]; polyanion (B)}(6−). The polyanion pairs both form dimers of the same formula, viz. {[H(10) α-Pt2Mo(12)O(48)]}(6−) connected by seven interpolyanion O—H⋯O hydrogen bonds. |
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