Kristallstrukturen der Monofluorosulfite MSO2F (M = K,Rb) |
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Authors: | Ulrich Keß ler,Martin Jansen |
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Abstract: | Crystal Structures of Monofluorosulfites MSO2F (M = K, Rb) Single crystals of potassium and rubidium fluorosulfite were obtained for the first time by reacting the alkali metal fluorides with sulfur dioxide in acetonitrile at 75 °C. According to the results of X‐ray structure determinations they are isotypic (monoclinic, P21/m, Z = 2, KSO2F: a = 696.2(2), b = 566.3(2), c = 465.8(1) pm, β = 107.73(2)°, RbSO2F: a = 717.2(1), b = 586.7(1), c = 484.0(1) pm, β = 107.14(1)°) and structurally analogous to potassium chlorate. In contrast to potassium fluoroselenite in which the complex anions are polymerized to linear chains by unsymmetric fluorine bridges, the fluorosulfite anion is isolated. The S–F‐distance of 159.1(2) pm (KSO2F) corresponds to a S–F single bond, the S–O‐distance of 152.6(2) pm indicates a bond order of 1.5. |
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Keywords: | Fluorosulfite Potassium Rubidium Crystal structure Vibrational spectra DTA/TG |
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