Tetra- and Pentanuclear Iodobismuthates with the Cation Based on 2,3,5,6-Tetramethylpyrazine: Syntheses and Crystal Structures

Abstract

Complexes (HTMP)₄[Bi₄I₁₆] · 2H₂O · 2(CH₃)₂CO (I) and (HTMP)₃[Bi₅I₁₈] · 5THF (II) have been synthesized by the reactions of BiI₃ and 2,3,5,6-tetramethylpyrazine (TMP) in acetone and tetrahydrofuran (THF), respectively. The crystal structures of both compounds were determined by X-ray diffraction analysis (СIF files CCDC nos. 1817306 (I) and 1817307 (II)). In both cases, the complexes in the solid state feature supramolecular contacts between the π systems of the cations and iodide ligands of the anions.