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The article describes the crystal structure of the organic compound bis[4-(trimethylammonio)phenyl] disulfide diiodide acetone solvate through synthesis and characterization. Findings show the location of iodide ions and acetone solvent molecules between the dications with symmetry-related quaternary ammonium ions around them. Also reported is the position of the anions near the benzene rings as well as the interactions between the acetone atom O1 and atom C7 of the methyl group. Experiment on the preparation of the compound is presented.

In the title compound, {[Sm(4-pya)3(H2O)2]·2H2O} n [4-pya is trans-3-(4-pyrid­yl)acrylate, C8H6NO2], each SmIII atom is ten-coordinated and has a bicapped square-antiprismatic coordination geometry. There is a crystallographic center of symmetry at the mid-point of the Sm⋯Sm line within each [Sm(4-pya)3(H2O)2]2 dimer. Each dimer is inter­connected by two pairs of bridging 4-pya ligands to form a one-dimensional chain. Neighboring chains are connected via hydrogen bonds to form a three-dimensional network. [ABSTRACT FROM AUTHOR]

The title compound, C9H13NO3S2, exists as a zwitterion with crystallographic mirror symmetry. The central S atom of the S2O3 group adopts a slightly distorted tetrahedral coordination geometry. The S-S bond length is 2.1137 (7) Å, while the S-O bond lengths are in the range 1.4417 (12)-1.457 (2) Å. The zwitterions in the crystal adopt a head-to-tail arrangement, which leads to the formation of a three-dimensional network through C-H···O hydrogen bonds. [ABSTRACT FROM AUTHOR]