Über K₂Si(S₂O₇)₃, eine weitere SiO₂SO₃−Verbindung

Abstract

(K2SiO3)x mit hochpolymerem Kettenanion reagiert mit SO3 zur Verbindung K2SiO3 · 6 SO3, in der das SO3 in Form von S2O7−Gruppen gebunden ist und das Si in isolierten Silicium‐Sauerstoff‐Polyedern vorliegt. Eigenschaften der damit als K2Si(S2O7)3 zu formulierenden Verbindung werden beschrieben und Strukturmöglichkeiten diskutiert.

Reactions with Oleum under Harsh Conditions: Characterization of the Unique [M(S2O7)3]2− Ions (M=Si, Ge, Sn) in A2[M(S2O7)3] (A=NH4, Ag)

“…Both contain the unprecedented tris ‐(disulfato)‐silicate anion [Si(S 2 O 7 ) 3 ] 2− , which has a central silicon atom in octahedral coordination with three chelating disulfate groups. Although this type of coordination was already proposed by Thilo and Winkler in 1969, structural proof was not previously available 8. Furthermore, this was the first time that such coordination could be established with inorganic ligands, because the previous examples of silicon complexes with octahedral oxygen coordination were based exclusively on organic ligands 9.…”

“…Although this type of coordination was already proposed by Thilo and Winkler in 1969, structural proof was not previously available. [8] Furthermore, this was the first time that such coordination could be established with inorganic ligands, because the previous examples of sili- 29 Si solid-state NMR measurements have been performed, with the results showing a signal at À215.5 ppm for (NH 4…”

New Compounds Bearing [M(S2O7)3]2– Anions (M = Si, Ge, Sn): Syntheses and Characterization of A2[Si(S2O7)3] (A = Na, K, Rb), A2[Ge(S2O7)3] (A = Li, Na, K, Rb, Cs), A2[Sn(S2O7)3] (A = Na, K), and the Unique Germanate Hg2[Ge(S2O7)3]Cl2 with Cationic 1∞[HgClLogemann1, Witt2, Gunzelmann3 et al. 2012Zeitschrift anorg allge chemie25260View full textAdd to dashboardCite

“…This type of structure has already been proposed back in 1969 by Thilo and Winkler for K 2 Si(S 2 O 7 ) 3 , however, without a structural prove. [9] Subsequently we were able to prepare also the heavier analogs [M(S 2 O 7 ) 3 ] 2with M = Ge, Sn, including theoretical and spectroscopic investigations. [ M AǞ Li Na [8] K R b C s [9] "(HgCl)" ȇ [14] Although six different crystal structure types are found for the tris-disulfato-metallates the arrangement of the complex [M(S 2 O 7 ) 3 ] 2anions is very similar in all of the structures.…”

“…[9] Subsequently we were able to prepare also the heavier analogs [M(S 2 O 7 ) 3 ] 2with M = Ge, Sn, including theoretical and spectroscopic investigations. [ M AǞ Li Na [8] K R b C s [9] "(HgCl)" ȇ [14] Although six different crystal structure types are found for the tris-disulfato-metallates the arrangement of the complex [M(S 2 O 7 ) 3 ] 2anions is very similar in all of the structures. They are stacked to form rods along a certain direction which are themselves arranged in a rod packing fashion.…”

The [Si(S2O7)3]2− Anion: A First Example of Octahedral Silicon Coordination by Three Chelating Inorganic Ligands

“…Herein, we present the first example of a complex silicate anion with octahedral silicon coordination by three chelating inorganic ligands, namely, three disulfate groups (Figure 1 . [8] The compound was obtained by the reaction of K 2 SiO 3 with SO 3 , but unfortunately no structure determination was performed. However, the authors suggested that a complex anion with octahedrally coordinated silicon may have formed.…”