Ionic Liquid-Driven Formation of and Cation Exchange in Layered Sulfido Stannates - a CH₂ Group Makes the Difference.

ABSTRACT: Two types of layered sulfido stannates or a molecular cluster compound are obtained upon ionothermal treatment of the simple sulfido stannate salt K₄ [SnS₄ ]? · ?4H₂ O that is based on binary tetrahedral [SnS₄ ]^4- anions. The formation of the respective products, novel compounds (C₄ C₁ C₁ Im)₂ [Sn₃ S₇ ] (1?a), (C₄ C₁ C₂ Im)₂ [Sn₃ S₇ ] (1?b), and (C₄ C₁ C₂ Im)₂ [Sn₄ S₉ ] (2) with layered anionic substructures, or the recently reported compound (C₄ C₁ C₁ Im)_4+x [Sn₁₀ O₄ S₁₆ (SMe)₄ ][An]_x (A) comprising a molecular cluster anion, is controlled by both the choice of the ionic liquid cation and the reaction temperature. We report the scale-up of the syntheses by a factor of 100 with regard to other reported ionothermal syntheses of related compounds, and a procedure of how to isolate them in phase-pure form - both being rare observations in chalcogenido stannate chemistry in ionic liquids. Moreover, the synthesis of compound 1?a can be achieved by rapid cation exchange starting out from 1?b, which has not been reported for organic cations in any chalcogenido stannate salt to date.

SUBMITTER: Peters B 

PROVIDER: S-EPMC7874508 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature