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Efficient Synthesis and Properties of Single‐Crystalline [SnTe4]4− Salts
Authors:Eugen Ruzin  Andreas Kracke  Stefanie Dehnen
Abstract:Single‐crystalline K+, Rb+, and Cs+ salts of the ortho‐tellurostannate anion have been prepared by a very efficient fusing/extraction/evaporation method. The resulting compounds with the general composition [A4(H2O)n][SnTe4] can be transferred into mixed H2O/en solvates by solving the hydrates in 1,2‐diaminoethane (en) and ensuing layering by toluene. A mixed Rb+/Ba2+ salt results from a partial cation exchange of the Rb+ hydrate phase in solution. All hydrates react to polytellurides when exposed to air and represent useful starting materials for the synthesis of transition metal complexes with [SnTe4]4? groups as binary main group elemental ligands. [K4(H2O)0.5][SnTe4] ( 1 ), [Rb4(H2O)2][SnTe4] ( 2 ), [Cs4(H2O)2][SnTe4] ( 3 ), [K4(H2O)(en)][SnTe4] ( 4 ), [Rb4(H2O)0.67(en)0.33][SnTe4] ( 5 ), [Cs4(H2O)0.5(en)0.5][SnTe4] ( 6 ), and [Rb2Ba(H2O)11][SnTe4] ( 7 ) were characterized by means of X‐ray diffractometry and optical absorption spectroscopy.
Keywords:Alkali(ne earth) metal cations  Tellurostannate anions  Crystal structures  UV‐visible spectroscopy
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